diff --git a/.github/helper-bot/github-helper.js b/.github/helper-bot/github-helper.js
new file mode 100644
index 0000000..08759b2
--- /dev/null
+++ b/.github/helper-bot/github-helper.js
@@ -0,0 +1,59 @@
+if (!process.env.CI) {
+  // mock a bunch of things for testing locally -- https://github.com/actions/toolkit/issues/71
+  process.env.GITHUB_REPOSITORY = 'PrismarineJS/bedrock-protocol'
+  process.env.GITHUB_EVENT_NAME = 'issue_comment'
+  process.env.GITHUB_SHA = 'cb2fd97b6eae9f2c7fee79d5a86eb9c3b4ac80d8'
+  process.env.GITHUB_REF = 'refs/heads/master'
+  process.env.GITHUB_WORKFLOW = 'Issue comments'
+  process.env.GITHUB_ACTION = 'run1'
+  process.env.GITHUB_ACTOR = 'test-user'
+  module.exports = { getIssueStatus: () => ({}), updateIssue: () => {}, createIssue: () => {} }
+  return
+}
+
+// const { Octokit } = require('@octokit/rest') // https://github.com/octokit/rest.js
+const github = require('@actions/github')
+
+const token = process.env.GITHUB_TOKEN
+const octokit = github.getOctokit(token)
+const context = github.context
+
+async function getIssueStatus (title) {
+  // https://docs.github.com/en/rest/reference/search#search-issues-and-pull-requests
+  const existingIssues = await octokit.rest.search.issuesAndPullRequests({
+    q: `is:issue repo:${process.env.GITHUB_REPOSITORY} in:title ${title}`
+  })
+  // console.log('Existing issues', existingIssues)
+  const existingIssue = existingIssues.data.items.find(issue => issue.title === title)
+
+  if (!existingIssue) return {}
+
+  return { open: existingIssue.state === 'open', closed: existingIssue.state === 'closed', id: existingIssue.number }
+}
+
+async function updateIssue (id, payload) {
+  const issue = await octokit.rest.issues.update({
+    ...context.repo,
+    issue_number: id,
+    body: payload.body
+  })
+  console.log(`Updated issue ${issue.data.title}#${issue.data.number}: ${issue.data.html_url}`)
+}
+
+async function createIssue (payload) {
+  const issue = await octokit.rest.issues.create({
+    ...context.repo,
+    ...payload
+  })
+  console.log(`Created issue ${issue.data.title}#${issue.data.number}: ${issue.data.html_url}`)
+}
+
+async function close (id, reason) {
+  if (reason) await octokit.rest.issues.createComment({ ...context.repo, issue_number: id, body: reason })
+  const issue = await octokit.rest.issues.update({ ...context.repo, issue_number: id, state: 'closed' })
+  console.log(`Closed issue ${issue.data.title}#${issue.data.number}: ${issue.data.html_url}`)
+}
+
+if (process.env.CI) {
+  module.exports = { getIssueStatus, updateIssue, createIssue, close }
+}
diff --git a/.github/helper-bot/index.js b/.github/helper-bot/index.js
index 8dffc6c..e9d5893 100644
--- a/.github/helper-bot/index.js
+++ b/.github/helper-bot/index.js
@@ -1,7 +1,7 @@
 // Automatic version update checker for Minecraft bedrock edition.
 const fs = require('fs')
 const cp = require('child_process')
-const helper = require('gh-helpers')()
+const helper = require('./github-helper')
 const latestVesionEndpoint = 'https://itunes.apple.com/lookup?bundleId=com.mojang.minecraftpe&time=' + Date.now()
 const changelogURL = 'https://feedback.minecraft.net/hc/en-us/sections/360001186971-Release-Changelogs'
 
@@ -102,10 +102,11 @@ async function fetchLatest () {
   console.log(version, currentVersionReleaseDate, releaseNotes)
 
   const title = `Support Minecraft ${result.version}`
-  const issueStatus = await helper.findIssue({ titleIncludes: title }) || {}
+
+  const issueStatus = await helper.getIssueStatus(title)
 
   if (supportedVersions.includes(version)) {
-    if (issueStatus.isOpen) {
+    if (issueStatus.open) {
       helper.close(issueStatus.id, `Closing as ${version} is now supported`)
     }
     console.log('Latest version is supported.')
@@ -113,7 +114,7 @@ async function fetchLatest () {
   }
 
 
-  if (issueStatus.isClosed) {
+  if (issueStatus.closed) {
     // We already made an issue, but someone else already closed it, don't do anything else
     console.log('I already made an issue, but it was closed')
     return
@@ -126,7 +127,7 @@ async function fetchLatest () {
     CloudburstMC: getCommitsInRepo('CloudburstMC/Protocol', version, currentVersionReleaseDate)
   })
 
-  if (issueStatus.isOpen) {
+  if (issueStatus.open) {
     helper.updateIssue(issueStatus.id, issuePayload)
   } else {
     helper.createIssue(issuePayload)
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4176a31..e2055cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
-        node-version: [22.x]
+        node-version: [18.x]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 14
     steps:
@@ -26,11 +26,5 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    # Old versions of bedrock use old libssl that Ubuntu no longer ships with; need manual install
-    - name: (Linux) Install libssl 1.1
-      if: runner.os == 'Linux'
-      run: |
-        wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.deb
-        sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb
     - run: npm install
     - run: npm test
diff --git a/.github/workflows/update-helper.yml b/.github/workflows/update-helper.yml
index d9380da..84f2dfe 100644
--- a/.github/workflows/update-helper.yml
+++ b/.github/workflows/update-helper.yml
@@ -14,9 +14,9 @@ jobs:
     - name: Set up Node.js
       uses: actions/setup-node@master
       with:
-        node-version: 22.0.0
-    - name: Install Github Actions helper
-      run: npm i gh-helpers
+        node-version: 18.0.0
+    - name: Install Github Actions toolkit
+      run: npm i @actions/github
     # The env vars contain the relevant trigger information, so we don't need to pass it
     - name: Runs helper
       run: cd .github/helper-bot && node index.js
diff --git a/HISTORY.md b/HISTORY.md
index 799d0a9..a1054f2 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,79 +1,3 @@
-## 3.49.0
-* [1.21.111 (#649)](https://github.com/PrismarineJS/bedrock-protocol/commit/b48518a6e79e72101fe7136433cbd6277339fc5c) (thanks @Slauh)
-* [Skin Data Changes (#647)](https://github.com/PrismarineJS/bedrock-protocol/commit/407756b93880cdda4fdbff194fc4163ceedf4e82) (thanks @thejfkvis)
-
-## 3.48.1
-* [Update login client skinData (#635)](https://github.com/PrismarineJS/bedrock-protocol/commit/6b1474d2c6f93b47dee9d4816de59579f82ed5a9) (thanks @TSL534)
-
-## 3.48.0
-* [1.21.100 (#632)](https://github.com/PrismarineJS/bedrock-protocol/commit/06fb3de3a0023d03201dbcee7e9178c269462766) (thanks @extremeheat)
-
-## 3.47.0
-* [1.21.93 support (#623)](https://github.com/PrismarineJS/bedrock-protocol/commit/14daa2d95aac90ffcc7b42d625e270020ec2f162) (thanks @CreeperG16)
-
-## 3.46.0
-* [1.21.90 support (#617)](https://github.com/PrismarineJS/bedrock-protocol/commit/c66cdd3d62d2fa9c581693d8c70d7b41f355b63e) (thanks @CreeperG16)
-
-## 3.45.0
-* [1.21.80 (#602)](https://github.com/PrismarineJS/bedrock-protocol/commit/e71fd513ddbd432983f221980080b61e11576965) (thanks @extremeheat)
-
-## 3.44.0
-* [1.21.70 (#594)](https://github.com/PrismarineJS/bedrock-protocol/commit/065f41db8cfc8cbd8106bd9e376c899ec25f3f77) (thanks @CreeperG16)
-
-## 3.43.1
-* [Fix server not correctly removing clients (#588)](https://github.com/PrismarineJS/bedrock-protocol/commit/47f342ca958ba87a7719783bd5c855cebdd4aa65) (thanks @EntifiedOptics)
-
-## 3.43.0
-* [1.21.60 support (#570)](https://github.com/PrismarineJS/bedrock-protocol/commit/eeb5e47e35f31cc571a9a8a491f5a89b27e637f1) (thanks @CreeperG16)
-* [Fix version feature handling (#572)](https://github.com/PrismarineJS/bedrock-protocol/commit/0ed8e32be85f05926cd97d5f0317ed004ae5eefa) (thanks @ItsMax123)
-
-## 3.42.3
-* [Fix Server `maxPlayers` option (#565)](https://github.com/PrismarineJS/bedrock-protocol/commit/38dc5a256105a44786d5455570d5a130e64ef561) (thanks @extremeheat)
-
-## 3.42.2
-* Fix missing type serialization error
- 
-## 3.42.1
-* [Add 1.21.40 login fields (#553)](https://github.com/PrismarineJS/bedrock-protocol/commit/24d3200181c060162b04fb233fef6e0d6d1a93aa) (thanks @extremeheat)
-* [Remove protodef varint types (#552)](https://github.com/PrismarineJS/bedrock-protocol/commit/347e303ce422bdb6f6dfd4cba57d7d3937214707) (thanks @extremeheat)
-
-## 3.42.0
-* [1.21.50 support](https://github.com/PrismarineJS/bedrock-protocol/commit/1c0836bff03d50cb12a3e45763eac6c9f605e00c) (thanks @extremeheat)
-* [Dynamic compression & batch header (#544)](https://github.com/PrismarineJS/bedrock-protocol/commit/911e0e890febc00102cd1e5406731e66f7bad0ef) (thanks @LucienHH)
-
-## 3.41.0
-* [1.21.42 support](https://github.com/PrismarineJS/bedrock-protocol/commit/dd5c4de4f2624c3654af66e9a40a65eb13de0850) (thanks @CreeperG16)
-
-## 3.40.0
-* [1.21.30 support (#527)](https://github.com/PrismarineJS/bedrock-protocol/commit/fc30c96135ec20dca1257f702152cba61d4a59be) (thanks @pokecosimo)
-* [Update tests (#528)](https://github.com/PrismarineJS/bedrock-protocol/commit/cb530c8b45bf505f75e0e39241d88085c5564ae8) (thanks @extremeheat)
-
-## 3.39.0
-* [1.21.20](https://github.com/PrismarineJS/bedrock-protocol/commit/3be55777fab4949179d3a7108ee29bbd8fada5a7) (thanks @extremeheat)
-* [update disconnect packet](https://github.com/PrismarineJS/bedrock-protocol/commit/4c3f62567e0f6ce20b70ea23238fce8606011e95) (thanks @extremeheat)
-
-## 3.38.0
-* [Support 1.21.2, and add missing versions to type definitions (#510)](https://github.com/PrismarineJS/bedrock-protocol/commit/5d3986924d3f262708d7c7e55a7f410f12c7903c) (thanks @CreeperG16)
-* [Fix example in README.md for 1.21 (#506)](https://github.com/PrismarineJS/bedrock-protocol/commit/c4593aa355d6ce9e2ac65cc2102cd9285a6b6449) (thanks @Ant767)
-* [Don't send now deprecated tick sync packets on 1.21 and newer (#504)](https://github.com/PrismarineJS/bedrock-protocol/commit/84c5231b92df9f5f1a09b29a05e7abfed62f1c2b) (thanks @w0ahL)
-
-## 3.37.0
-* [Support 1.21.0](https://github.com/PrismarineJS/bedrock-protocol/commit/5b2d78792c9b4c070d727a9028a6b3a266483e1c) (thanks @CreeperG16)
-* [Fix typo in types (#501)](https://github.com/PrismarineJS/bedrock-protocol/commit/16e15d80a5084a19ed2fbabc023789ee38922b3a) (thanks @Kaaaaii)
-
-## 3.36.0
-* [Support 1.20.80](https://github.com/PrismarineJS/bedrock-protocol/commit/bd32aa8d04555fa2fdc4ecd6abbeb6124e2ae8bb) (thanks @extremeheat)
-
-## 3.35.0
-* [Support 1.20.71](https://github.com/PrismarineJS/bedrock-protocol/commit/d8e707112acc038b6c9564d9a21b2f977326e47f) (thanks @extremeheat)
-* [Note `npm update` command in readme](https://github.com/PrismarineJS/bedrock-protocol/commit/ab93d0d0824bd0ace250fb73f703dc7b60ecd780) (thanks @extremeheat)
-
-## 3.34.0
-* [1.20.61 support (#480)](https://github.com/PrismarineJS/bedrock-protocol/commit/c278a03f952d23320b80f8c09b6372d41eeff26a) (thanks @extremeheat)
-* [Compressor handling update for 1.20.60 (#479)](https://github.com/PrismarineJS/bedrock-protocol/commit/d3161badc65f2eba4b6e7c9e974ca4e3529a7e94) (thanks @extremeheat)
-* [Update and rename CONTRIBUTING.md to docs/CONTRIBUTING.md (#475)](https://github.com/PrismarineJS/bedrock-protocol/commit/be6f0cde9f7970a4f9aa376c589c58d8cb4187c3) (thanks @extremeheat)
-* [Add flow and deviceType options to relay (#464)](https://github.com/PrismarineJS/bedrock-protocol/commit/842e66266f09e8670a644a618d0ac4157746cd43) (thanks @GameParrot)
-
 ## 3.33.1
 * [Fix zigzag type move in prismarine-nbt (#471)](https://github.com/PrismarineJS/bedrock-protocol/commit/7b74cbf7129646adc80d50304afce6240848cfae) (thanks @extremeheat)
 
diff --git a/README.md b/README.md
index 5e3add2..00b97b9 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Minecraft Bedrock Edition (aka MCPE) protocol library, supporting authentication
 
 ## Features
 
- - Supports Minecraft Bedrock version 1.16.201, 1.16.210, 1.16.220, 1.17.0, 1.17.10, 1.17.30, 1.17.40, 1.18.0, 1.18.11, 1.18.30, 1.19.1, 1.19.10, 1.19.20, 1.19.21, 1.19.30, 1.19.40, 1.19.41, 1.19.50, 1.19.60, 1.19.62, 1.19.63, 1.19.70, 1.19.80, 1.20.0, 1.20.10, 1.20.30, 1.20.40, 1.20.50, 1.20.61, 1.20.71, 1.20.80, 1.21.0, 1.21.2, 1.21.21, 1.21.30, 1.21.42, 1.21.50, 1.21.60, 1.21.70, 1.21.80, 1.21.90, 1.21.93, 1.21.100, 1.21.111
+ - Supports Minecraft Bedrock version 1.16.201, 1.16.210, 1.16.220, 1.17.0, 1.17.10, 1.17.30, 1.17.40, 1.18.0, 1.18.11, 1.18.30, 1.19.1, 1.19.10, 1.19.20, 1.19.21, 1.19.30, 1.19.40, 1.19.41, 1.19.50, 1.19.60, 1.19.62, 1.19.63, 1.19.70, 1.19.80, 1.20.0, 1.20.10, 1.20.30, 1.20.40, 1.20.50
  - Parse and serialize packets as JavaScript objects
  - Automatically respond to keep-alive packets
  - [Proxy and mitm connections](docs/API.md#proxy-docs)
@@ -34,8 +34,6 @@ Want to contribute on something important for PrismarineJS ? go to https://githu
 
 `npm install bedrock-protocol`
 
-To update bedrock-protocol (or any Node.js package) and its dependencies after a previous install, you must run `npm update --depth 9999`
-
 ## Usage
 
 ### Client example
@@ -54,7 +52,7 @@ const client = bedrock.createClient({
 client.on('text', (packet) => { // Listen for chat messages from the server and echo them back.
   if (packet.source_name != client.username) {
     client.queue('text', {
-      type: 'chat', needs_translation: false, source_name: client.username, xuid: '', platform_chat_id: '', filtered_message: '',
+      type: 'chat', needs_translation: false, source_name: client.username, xuid: '', platform_chat_id: '',
       message: `${packet.source_name} said: ${packet.message} on ${new Date().toLocaleString()}`
     })
   }
diff --git a/docs/API.md b/docs/API.md
index d69c385..b7b5722 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -142,7 +142,7 @@ client.on('text', (packet) => {
 // names and as explained in the "Protocol doc" section below, fields are all case sensitive!
 client.on('add_player', (packet) => {
   client.queue('text', {
-    type: 'chat', needs_translation: false, source_name: client.username, xuid: '', platform_chat_id: '', filtered_message: '',
+    type: 'chat', needs_translation: false, source_name: client.username, xuid: '', platform_chat_id: '',
     message: `Hey, ${packet.username} just joined!`
   })
 })
diff --git a/examples/client/client.js b/examples/client/client.js
index 9f17e57..7bbd028 100644
--- a/examples/client/client.js
+++ b/examples/client/client.js
@@ -10,7 +10,7 @@ const client = bedrock.createClient({
 client.on('text', (packet) => { // Listen for chat messages and echo them back.
   if (packet.source_name != client.username) {
     client.queue('text', {
-      type: 'chat', needs_translation: false, source_name: client.username, xuid: '', platform_chat_id: '', filtered_message: '',
+      type: 'chat', needs_translation: false, source_name: client.username, xuid: '', platform_chat_id: '',
       message: `${packet.source_name} said: ${packet.message} on ${new Date().toLocaleString()}`
     })
   }
diff --git a/index.d.ts b/index.d.ts
index 3f4a571..c93b5a9 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -3,7 +3,7 @@ import { Realm } from 'prismarine-realms'
 import { ServerDeviceCodeResponse } from 'prismarine-auth'
 
 declare module 'bedrock-protocol' {
-  type Version = '1.21.93' | '1.21.90' | '1.21.80' | '1.21.70' | '1.21.60' | '1.21.50' | '1.21.42' | '1.21.30' | '1.21.2' | '1.21.0' | '1.20.80' | '1.20.71' | '1.20.61' | '1.20.50' | '1.20.40' | '1.20.30' | '1.20.10' | '1.20.0' | '1.19.80' | '1.19.70' | '1.19.63' | '1.19.62' | '1.19.60' | '1.19.51' | '1.19.50' | '1.19.41' | '1.19.40' | '1.19.31' | '1.19.30' | '1.19.22' | '1.19.21' | '1.19.20' | '1.19.11' | '1.19.10' | '1.19.2' | '1.19.1' | '1.18.31' | '1.18.30' | '1.18.12' | '1.18.11' | '1.18.10' | '1.18.2' | '1.18.1' | '1.18.0' | '1.17.41' | '1.17.40' | '1.17.34' | '1.17.30' | '1.17.11' | '1.17.10' | '1.17.0' | '1.16.220' | '1.16.210' | '1.16.201'
+  type Version = '1.20.40' | '1.20.30' | '1.20.10' | '1.20.0' | '1.19.80' | '1.19.70' | '1.19.63' | '1.19.62' | '1.19.60' | '1.19.51' | '1.19.50' | '1.19.41' | '1.19.40' | '1.19.31' | '1.19.30' | '1.19.22' | '1.19.21' | '1.19.20' | '1.19.11' | '1.19.10' | '1.19.2' | '1.19.1' | '1.18.31' | '1.18.30' | '1.18.12' | '1.18.11' | '1.18.10' | '1.18.2' | '1.18.1' | '1.18.0' | '1.17.41' | '1.17.40' | '1.17.34' | '1.17.30' | '1.17.11' | '1.17.10' | '1.17.0' | '1.16.220' | '1.16.210' | '1.16.201'
 
   export interface Options {
     // The string version to start the client or server as
@@ -63,7 +63,7 @@ declare module 'bedrock-protocol' {
   }
 
   enum ClientStatus {
-    Disconnected,
+    Disconected,
     Authenticating,
     Initializing,
     Initialized
@@ -162,7 +162,7 @@ declare module 'bedrock-protocol' {
 
     constructor(options: Options)
 
-    listen(): Promise<void>
+    listen(host?: string, port?: number): Promise<void>
     close(disconnectReason?: string): Promise<void>
 
     on(event: 'connect', cb: (client: Player) => void): any
diff --git a/package.json b/package.json
index 6301be0..f150728 100644
--- a/package.json
+++ b/package.json
@@ -1,15 +1,15 @@
 {
   "name": "bedrock-protocol",
-  "version": "3.49.0",
+  "version": "3.33.1",
   "description": "Minecraft Bedrock Edition protocol library",
   "main": "index.js",
   "types": "index.d.ts",
   "scripts": {
     "build": "cd tools && node compileProtocol.js",
-    "test": "mocha --retries 2 --bail --exit",
+    "test": "mocha --bail --exit",
     "pretest": "npm run lint",
     "lint": "standard",
-    "vanillaServer": "minecraft-bedrock-server --root tools --version",
+    "vanillaServer": "node tools/startVanillaServer.js",
     "dumpPackets": "node tools/genPacketDumps.js",
     "fix": "standard --fix"
   },
@@ -40,8 +40,7 @@
     "bedrock-protocol": "file:.",
     "bedrock-provider": "^2.0.0",
     "leveldb-zlib": "^1.0.1",
-    "minecraft-bedrock-server": "^1.4.2",
-    "mocha": "^11.0.1",
+    "mocha": "^10.0.0",
     "protodef-yaml": "^1.1.0",
     "standard": "^17.0.0-2"
   },
diff --git a/src/client.js b/src/client.js
index e3af1d0..b6bb0ac 100644
--- a/src/client.js
+++ b/src/client.js
@@ -26,7 +26,6 @@ class Client extends Connection {
     this.compressionAlgorithm = this.versionGreaterThanOrEqualTo('1.19.30') ? 'none' : 'deflate'
     this.compressionThreshold = 512
     this.compressionLevel = this.options.compressionLevel
-    this.batchHeader = 0xfe
 
     if (isDebug) {
       this.inLog = (...args) => debug('C ->', ...args)
@@ -43,7 +42,6 @@ class Client extends Connection {
     this.validateOptions()
     this.serializer = createSerializer(this.options.version)
     this.deserializer = createDeserializer(this.options.version)
-    this._loadFeatures()
 
     KeyExchange(this, null, this.options)
     Login(this, null, this.options)
@@ -57,19 +55,6 @@ class Client extends Connection {
     this.emit('connect_allowed')
   }
 
-  _loadFeatures () {
-    try {
-      const mcData = require('minecraft-data')('bedrock_' + this.options.version)
-      this.features = {
-        compressorInHeader: mcData.supportFeature('compressorInPacketHeader'),
-        itemRegistryPacket: mcData.supportFeature('itemRegistryPacket'),
-        newLoginIdentityFields: mcData.supportFeature('newLoginIdentityFields')
-      }
-    } catch (e) {
-      throw new Error(`Unsupported version: '${this.options.version}', no data available`)
-    }
-  }
-
   connect () {
     if (!this.connection) throw new Error('Connect not currently allowed') // must wait for `connect_allowed`, or use `createClient`
     this.on('session', this._connect)
@@ -135,7 +120,6 @@ class Client extends Connection {
   updateCompressorSettings (packet) {
     this.compressionAlgorithm = packet.compression_algorithm || 'deflate'
     this.compressionThreshold = packet.compression_threshold
-    this.compressionReady = true
   }
 
   sendLogin () {
@@ -147,18 +131,9 @@ class Client extends Connection {
       ...this.accessToken // Mojang + Xbox JWT from auth
     ]
 
-    let encodedChain
-    if (this.features.newLoginIdentityFields) { // 1.21.90+
-      encodedChain = JSON.stringify({
-        Certificate: JSON.stringify({ chain }),
-        // 0 = normal, 1 = ss, 2 = offline
-        AuthenticationType: this.options.offline ? 2 : 0,
-        Token: ''
-      })
-    } else {
-      encodedChain = JSON.stringify({ chain })
-    }
-    debug('Auth chain', encodedChain)
+    const encodedChain = JSON.stringify({ chain })
+
+    debug('Auth chain', chain)
 
     this.write('login', {
       protocol_version: this.options.protocolVersion,
@@ -195,8 +170,7 @@ class Client extends Connection {
     if (this.status === ClientStatus.Disconnected) return
     this.write('disconnect', {
       hide_disconnect_screen: hide,
-      message: reason,
-      filtered_message: ''
+      message: reason
     })
     this.close(reason)
   }
@@ -252,9 +226,7 @@ class Client extends Connection {
         break
       case 'start_game':
         this.startGameData = pakData.params
-        // fallsthrough
-      case 'item_registry': // 1.21.60+ send itemstates in item_registry packet
-        pakData.params.itemstates?.forEach(state => {
+        this.startGameData.itemstates.forEach(state => {
           if (state.name === 'minecraft:shield') {
             this.serializer.proto.setVariable('ShieldItemID', state.runtime_id)
             this.deserializer.proto.setVariable('ShieldItemID', state.runtime_id)
diff --git a/src/connection.js b/src/connection.js
index f1e9051..bc1d56b 100644
--- a/src/connection.js
+++ b/src/connection.js
@@ -28,25 +28,17 @@ class Connection extends EventEmitter {
   }
 
   versionLessThan (version) {
-    if (typeof version === 'string' && !Versions[version]) throw Error('Unknown version: ' + version)
     return this.options.protocolVersion < (typeof version === 'string' ? Versions[version] : version)
   }
 
   versionGreaterThan (version) {
-    if (typeof version === 'string' && !Versions[version]) throw Error('Unknown version: ' + version)
     return this.options.protocolVersion > (typeof version === 'string' ? Versions[version] : version)
   }
 
   versionGreaterThanOrEqualTo (version) {
-    if (typeof version === 'string' && !Versions[version]) throw Error('Unknown version: ' + version)
     return this.options.protocolVersion >= (typeof version === 'string' ? Versions[version] : version)
   }
 
-  versionLessThanOrEqualTo (version) {
-    if (typeof version === 'string' && !Versions[version]) throw Error('Unknown version: ' + version)
-    return this.options.protocolVersion <= (typeof version === 'string' ? Versions[version] : version)
-  }
-
   startEncryption (iv) {
     this.encryptionEnabled = true
     this.inLog?.('Started encryption', this.sharedSecret, iv)
@@ -70,18 +62,10 @@ class Connection extends EventEmitter {
     }
   }
 
-  _processOutbound (name, params) {
-    if (name === 'item_registry') {
-      this.updateItemPalette(params.itemstates)
-    } else if (name === 'start_game' && params.itemstates) {
-      this.updateItemPalette(params.itemstates)
-    }
-  }
-
   write (name, params) {
     this.outLog?.(name, params)
-    this._processOutbound(name, params)
-    const batch = new Framer(this)
+    if (name === 'start_game') this.updateItemPalette(params.itemstates)
+    const batch = new Framer(this.compressionAlgorithm, this.compressionLevel, this.compressionThreshold)
     const packet = this.serializer.createPacketBuffer({ name, params })
     batch.addEncodedPacket(packet)
 
@@ -94,7 +78,7 @@ class Connection extends EventEmitter {
 
   queue (name, params) {
     this.outLog?.('Q <- ', name, params)
-    this._processOutbound(name, params)
+    if (name === 'start_game') this.updateItemPalette(params.itemstates)
     const packet = this.serializer.createPacketBuffer({ name, params })
     if (name === 'level_chunk') {
       // Skip queue, send ASAP
@@ -107,7 +91,7 @@ class Connection extends EventEmitter {
 
   _tick () {
     if (this.sendQ.length) {
-      const batch = new Framer(this)
+      const batch = new Framer(this.compressionAlgorithm, this.compressionLevel, this.compressionThreshold)
       batch.addEncodedPackets(this.sendQ)
       this.sendQ = []
       this.sendIds = []
@@ -131,7 +115,7 @@ class Connection extends EventEmitter {
    */
   sendBuffer (buffer, immediate = false) {
     if (immediate) {
-      const batch = new Framer(this)
+      const batch = new Framer(this.compressionAlgorithm, this.compressionLevel, this.compressionThreshold)
       batch.addEncodedPacket(buffer)
       if (this.encryptionEnabled) {
         this.sendEncryptedBatch(batch)
@@ -165,29 +149,29 @@ class Connection extends EventEmitter {
 
   // These are callbacks called from encryption.js
   onEncryptedPacket = (buf) => {
-    const packet = this.batchHeader ? Buffer.concat([Buffer.from([this.batchHeader]), buf]) : buf
+    const packet = Buffer.concat([Buffer.from([0xfe]), buf]) // add header
+
     this.sendMCPE(packet)
   }
 
   onDecryptedPacket = (buf) => {
     const packets = Framer.getPackets(buf)
+
     for (const packet of packets) {
       this.readPacket(packet)
     }
   }
 
   handle (buffer) { // handle encapsulated
-    if (!this.batchHeader || buffer[0] === this.batchHeader) { // wrapper
+    if (buffer[0] === 0xfe) { // wrapper
       if (this.encryptionEnabled) {
         this.decrypt(buffer.slice(1))
       } else {
-        const packets = Framer.decode(this, buffer)
+        const packets = Framer.decode(this.compressionAlgorithm, buffer)
         for (const packet of packets) {
           this.readPacket(packet)
         }
       }
-    } else {
-      throw Error('Bad packet header ' + buffer[0])
     }
   }
 }
diff --git a/src/createClient.js b/src/createClient.js
index 9d14134..154a8ae 100644
--- a/src/createClient.js
+++ b/src/createClient.js
@@ -56,41 +56,35 @@ function connect (client) {
     })
 
     client.queue('client_cache_status', { enabled: false })
-
-    if (client.versionLessThanOrEqualTo('1.20.80')) client.queue('tick_sync', { request_time: BigInt(Date.now()), response_time: 0n })
-
+    client.queue('tick_sync', { request_time: BigInt(Date.now()), response_time: 0n })
     sleep(500).then(() => client.queue('request_chunk_radius', { chunk_radius: client.viewDistance || 10 }))
   })
 
-  if (client.versionLessThanOrEqualTo('1.20.80')) {
-    const keepAliveInterval = 10
-    const keepAliveIntervalBig = BigInt(keepAliveInterval)
+  // Send tick sync packets every 10 ticks
+  const keepAliveInterval = 10
+  const keepAliveIntervalBig = BigInt(keepAliveInterval)
+  let keepalive
+  client.tick = 0n
+  client.once('spawn', () => {
+    keepalive = setInterval(() => {
+      // Client fills out the request_time and the server does response_time in its reply.
+      client.queue('tick_sync', { request_time: client.tick, response_time: 0n })
+      client.tick += keepAliveIntervalBig
+    }, 50 * keepAliveInterval)
 
-    let keepalive
-    client.tick = 0n
-
-    client.once('spawn', () => {
-      keepalive = setInterval(() => {
-        // Client fills out the request_time and the server does response_time in its reply.
-        client.queue('tick_sync', { request_time: client.tick, response_time: 0n })
-        client.tick += keepAliveIntervalBig
-      }, 50 * keepAliveInterval)
-
-      client.on('tick_sync', async packet => {
-        client.emit('heartbeat', packet.response_time)
-        client.tick = packet.response_time
-      })
+    client.on('tick_sync', async packet => {
+      client.emit('heartbeat', packet.response_time)
+      client.tick = packet.response_time
     })
+  })
 
-    client.once('close', () => {
-      clearInterval(keepalive)
-    })
-  }
+  client.once('close', () => {
+    clearInterval(keepalive)
+  })
 }
 
 async function ping ({ host, port }) {
   const con = new RakClient({ host, port })
-
   try {
     return advertisement.fromServerName(await con.ping())
   } finally {
diff --git a/src/datatypes/compiler-minecraft.js b/src/datatypes/compiler-minecraft.js
index 75fd0b9..3dd9483 100644
--- a/src/datatypes/compiler-minecraft.js
+++ b/src/datatypes/compiler-minecraft.js
@@ -1,7 +1,7 @@
 /* eslint-disable */
 const UUID = require('uuid-1345')
 const minecraft = require('./minecraft')
-const [Read, Write, SizeOf] = [{}, {}, {}]
+const { Read, Write, SizeOf } = require('./varlong')
 
 /**
  * UUIDs
@@ -116,6 +116,74 @@ Read.lnbt = ['native', minecraft.lnbt[0]]
 Write.lnbt = ['native', minecraft.lnbt[1]]
 SizeOf.lnbt = ['native', minecraft.lnbt[2]]
 
+/**
+ * Bits
+ */
+
+Read.bitflags = ['parametrizable', (compiler, { type, flags, shift, big }) => {
+  let fstr = JSON.stringify(flags)
+  if (Array.isArray(flags)) {
+    fstr = '{'
+    flags.map((v, k) => fstr += `"${v}": ${big ? 1n << BigInt(k) : 1 << k}` + (big ? 'n,' : ','))
+    fstr += '}'
+  } else if (shift) {
+    fstr = '{'
+    for (const key in flags) fstr += `"${key}": ${1 << flags[key]},`;
+    fstr += '}'
+  }
+  return compiler.wrapCode(`
+    const { value: _value, size } = ${compiler.callType(type, 'offset')}
+    const value = { _value }
+    const flags = ${fstr}
+    for (const key in flags) {
+      value[key] = (_value & flags[key]) == flags[key]
+    }
+    return { value, size }
+  `.trim())
+}]
+
+Write.bitflags = ['parametrizable', (compiler, { type, flags, shift, big }) => {
+  let fstr = JSON.stringify(flags)
+  if (Array.isArray(flags)) {
+    fstr = '{'
+    flags.map((v, k) => fstr += `"${v}": ${big ? 1n << BigInt(k) : 1 << k}` + (big ? 'n,' : ','))
+    fstr += '}'
+  } else if (shift) {
+    fstr = '{'
+    for (const key in flags) fstr += `"${key}": ${1 << flags[key]},`;
+    fstr += '}'
+  }
+  return compiler.wrapCode(`
+    const flags = ${fstr}
+    let val = value._value ${big ? '|| 0n' : ''}
+    for (const key in flags) {
+      if (value[key]) val |= flags[key]
+    }
+    return (ctx.${type})(val, buffer, offset)
+  `.trim())
+}]
+
+SizeOf.bitflags = ['parametrizable', (compiler, { type, flags, shift, big }) => {
+  let fstr = JSON.stringify(flags)
+  if (Array.isArray(flags)) {
+    fstr = '{'
+    flags.map((v, k) => fstr += `"${v}": ${big ? 1n << BigInt(k) : 1 << k}` + (big ? 'n,' : ','))
+    fstr += '}'
+  } else if (shift) {
+    fstr = '{'
+    for (const key in flags) fstr += `"${key}": ${1 << flags[key]},`;
+    fstr += '}'
+  }
+  return compiler.wrapCode(`
+    const flags = ${fstr}
+    let val = value._value ${big ? '|| 0n' : ''}
+    for (const key in flags) {
+      if (value[key]) val |= flags[key]
+    }
+    return (ctx.${type})(val)
+  `.trim())
+}]
+
 /**
  * Command Packet
  * - used for determining the size of the following enum
diff --git a/src/datatypes/minecraft.js b/src/datatypes/minecraft.js
index 117e5ff..1a9186d 100644
--- a/src/datatypes/minecraft.js
+++ b/src/datatypes/minecraft.js
@@ -1,11 +1,14 @@
+/* eslint-disable */
 const nbt = require('prismarine-nbt')
 const UUID = require('uuid-1345')
 
 const protoLE = nbt.protos.little
 const protoLEV = nbt.protos.littleVarint
+// TODO: deal with this:
+const zigzag = require('prismarine-nbt/zigzag')
 
 function readUUID (buffer, offset) {
-  if (offset + 16 > buffer.length) { throw new Error('Reached end of buffer') }
+  if (offset + 16 > buffer.length) { throw new PartialReadError() }
   return {
     value: UUID.stringify(buffer.slice(offset, 16 + offset)),
     size: 16
@@ -62,7 +65,7 @@ function readEntityMetadata (buffer, offset, _ref) {
   const metadata = []
   let item
   while (true) {
-    if (offset + 1 > buffer.length) throw new Error('Reached end of buffer')
+    if (offset + 1 > buffer.length) throw new PartialReadError()
     item = buffer.readUInt8(cursor)
     if (item === endVal) {
       return {
@@ -156,5 +159,7 @@ module.exports = {
   lnbt: [readNbtLE, writeNbtLE, sizeOfNbtLE],
   entityMetadataLoop: [readEntityMetadata, writeEntityMetadata, sizeOfEntityMetadata],
   ipAddress: [readIpAddress, writeIpAddress, 4],
-  endOfArray: [readEndOfArray, writeEndOfArray, sizeOfEndOfArray]
+  endOfArray: [readEndOfArray, writeEndOfArray, sizeOfEndOfArray],
+  zigzag32: zigzag.interpret.zigzag32,
+  zigzag64: zigzag.interpret.zigzag64
 }
diff --git a/src/datatypes/varlong.js b/src/datatypes/varlong.js
new file mode 100644
index 0000000..5e57ad7
--- /dev/null
+++ b/src/datatypes/varlong.js
@@ -0,0 +1,63 @@
+function sizeOfVarLong (value) {
+  if (typeof value.valueOf() === 'object') {
+    value = (BigInt(value[0]) << 32n) | BigInt(value[1])
+  } else if (typeof value !== 'bigint') value = BigInt(value)
+
+  let cursor = 0
+  while (value > 127n) {
+    value >>= 7n
+    cursor++
+  }
+  return cursor + 1
+}
+
+/**
+ * Reads a 64-bit VarInt as a BigInt
+ */
+function readVarLong (buffer, offset) {
+  let result = BigInt(0)
+  let shift = 0n
+  let cursor = offset
+  let size = 0
+
+  while (true) {
+    if (cursor + 1 > buffer.length) { throw new Error('unexpected buffer end') }
+    const b = buffer.readUInt8(cursor)
+    result |= (BigInt(b) & 0x7fn) << shift // Add the bits to our number, except MSB
+    cursor++
+    if (!(b & 0x80)) { // If the MSB is not set, we return the number
+      size = cursor - offset
+      break
+    }
+    shift += 7n // we only have 7 bits, MSB being the return-trigger
+    if (shift > 63n) throw new Error(`varint is too big: ${shift}`)
+  }
+
+  return { value: result, size }
+}
+
+/**
+ * Writes a zigzag encoded 64-bit VarInt as a BigInt
+ */
+function writeVarLong (value, buffer, offset) {
+  // if an array, turn it into a BigInt
+  if (typeof value.valueOf() === 'object') {
+    value = BigInt.asIntN(64, (BigInt(value[0]) << 32n)) | BigInt(value[1])
+  } else if (typeof value !== 'bigint') value = BigInt(value)
+
+  let cursor = 0
+  while (value > 127n) { // keep writing in 7 bit slices
+    const num = Number(value & 0xFFn)
+    buffer.writeUInt8(num | 0x80, offset + cursor)
+    cursor++
+    value >>= 7n
+  }
+  buffer.writeUInt8(Number(value), offset + cursor)
+  return offset + cursor + 1
+}
+
+module.exports = {
+  Read: { varint64: ['native', readVarLong] },
+  Write: { varint64: ['native', writeVarLong] },
+  SizeOf: { varint64: ['native', sizeOfVarLong] }
+}
diff --git a/src/handshake/login.js b/src/handshake/login.js
index 8a2830d..0a921fb 100644
--- a/src/handshake/login.js
+++ b/src/handshake/login.js
@@ -36,6 +36,7 @@ module.exports = (client, server, options) => {
   client.createClientUserChain = (privateKey) => {
     let payload = {
       ...skinData,
+      SkinGeometryDataEngineVersion: client.versionGreaterThanOrEqualTo('1.17.30') ? '' : undefined,
 
       ClientRandomId: Date.now(),
       CurrentInputMode: 1,
@@ -46,30 +47,25 @@ module.exports = (client, server, options) => {
       GameVersion: options.version || '1.16.201',
       GuiScale: -1,
       LanguageCode: 'en_GB', // TODO locale
-      GraphicsMode: 1, // 1:simple, 2:fancy, 3:advanced, 4:ray_traced
 
       PlatformOfflineId: '',
       PlatformOnlineId: '', // chat
       // PlayFabID is the PlayFab ID produced for the skin. PlayFab is the company that hosts the Marketplace,
       // skins and other related features from the game. This ID is the ID of the skin used to store the skin
-      // inside of PlayFab.The playfab ID is always lowercased.
-      PlayFabId: nextUUID().replace(/-/g, '').slice(0, 16).toLowerCase(), // 1.16.210
+      // inside of PlayFab.
+      PlayFabId: nextUUID().replace(/-/g, '').slice(0, 16), // 1.16.210
 
       SelfSignedId: nextUUID(),
       ServerAddress: `${options.host}:${options.port}`,
 
-      ThirdPartyName: client.profile.name, // Gamertag
-      ThirdPartyNameOnly: client.versionGreaterThanOrEqualTo('1.21.90') ? undefined : false,
+      ThirdPartyName: client.profile.name,
+      ThirdPartyNameOnly: false,
       UIProfile: 0,
 
       IsEditorMode: false,
       TrustedSkin: client.versionGreaterThanOrEqualTo('1.19.20') ? false : undefined,
       OverrideSkin: client.versionGreaterThanOrEqualTo('1.19.62') ? false : undefined,
-      CompatibleWithClientSideChunkGen: client.versionGreaterThanOrEqualTo('1.19.80') ? false : undefined,
-
-      MaxViewDistance: client.versionGreaterThanOrEqualTo('1.21.42') ? 0 : undefined,
-      MemoryTier: client.versionGreaterThanOrEqualTo('1.21.42') ? 0 : undefined,
-      PlatformType: client.versionGreaterThanOrEqualTo('1.21.42') ? 0 : undefined
+      CompatibleWithClientSideChunkGen: client.versionGreaterThanOrEqualTo('1.19.80') ? false : undefined
     }
     const customPayload = options.skinData || {}
     payload = { ...payload, ...customPayload }
diff --git a/src/options.js b/src/options.js
index 6e27dbe..fb285bd 100644
--- a/src/options.js
+++ b/src/options.js
@@ -3,12 +3,12 @@ const mcData = require('minecraft-data')
 // Minimum supported version (< will be kicked)
 const MIN_VERSION = '1.16.201'
 // Currently supported verson. Note, clients with newer versions can still connect as long as data is in minecraft-data
-const CURRENT_VERSION = '1.21.111'
+const CURRENT_VERSION = '1.20.50'
 
 const Versions = Object.fromEntries(mcData.versions.bedrock.filter(e => e.releaseType === 'release').map(e => [e.minecraftVersion, e.version]))
 
 // Skip some low priority versions (middle major) on Github Actions to allow faster CI
-const skippedVersionsOnGithubCI = ['1.16.210', '1.17.10', '1.17.30', '1.18.11', '1.19.10', '1.19.20', '1.19.30', '1.19.40', '1.19.50', '1.19.60', '1.19.63', '1.19.70', '1.20.10', '1.20.15', '1.20.30', '1.20.40', '1.20.50', '1.20.61', '1.20.71', '1.21.2', '1.21.20', '1.21.30', '1.21.42', '1.21.50', '1.21.60', '1.21.70', '1.21.80', '1.21.90']
+const skippedVersionsOnGithubCI = ['1.16.210', '1.17.10', '1.17.30', '1.18.11', '1.19.10', '1.19.20', '1.19.30', '1.19.40', '1.19.50', '1.19.60', '1.19.63', '1.19.70', '1.20.10']
 const testedVersions = process.env.CI ? Object.keys(Versions).filter(v => !skippedVersionsOnGithubCI.includes(v)) : Object.keys(Versions)
 
 const defaultOptions = {
diff --git a/src/server.js b/src/server.js
index 0b43fd2..5476455 100644
--- a/src/server.js
+++ b/src/server.js
@@ -15,7 +15,6 @@ class Server extends EventEmitter {
 
     this.RakServer = require('./rak')(this.options.raknetBackend).RakServer
 
-    this._loadFeatures(this.options.version)
     this.serializer = createSerializer(this.options.version)
     this.deserializer = createDeserializer(this.options.version)
     this.advertisement = new ServerAdvertisement(this.options.motd, this.options.port, this.options.version)
@@ -24,41 +23,25 @@ class Server extends EventEmitter {
     this.clients = {}
     this.clientCount = 0
     this.conLog = debug
-    this.batchHeader = 0xfe
 
     this.setCompressor(this.options.compressionAlgorithm, this.options.compressionLevel, this.options.compressionThreshold)
   }
 
-  _loadFeatures (version) {
-    try {
-      const mcData = require('minecraft-data')('bedrock_' + version)
-      this.features = {
-        compressorInHeader: mcData.supportFeature('compressorInPacketHeader'),
-        newLoginIdentityFields: mcData.supportFeature('newLoginIdentityFields')
-      }
-    } catch (e) {
-      throw new Error(`Unsupported version: '${version}', no data available`)
-    }
-  }
-
   setCompressor (algorithm, level = 1, threshold = 256) {
     switch (algorithm) {
       case 'none':
         this.compressionAlgorithm = 'none'
         this.compressionLevel = 0
-        this.compressionHeader = 255
         break
       case 'deflate':
         this.compressionAlgorithm = 'deflate'
         this.compressionLevel = level
         this.compressionThreshold = threshold
-        this.compressionHeader = 0
         break
       case 'snappy':
         this.compressionAlgorithm = 'snappy'
         this.compressionLevel = level
         this.compressionThreshold = threshold
-        this.compressionHeader = 1
         break
       default:
         throw new Error(`Unknown compression algorithm: ${algorithm}`)
@@ -90,10 +73,12 @@ class Server extends EventEmitter {
     this.emit('connect', player)
   }
 
-  onCloseConnection = (conn, reason) => {
-    this.conLog('Connection closed: ', conn.address, reason)
-    this.clients[conn.address]?.close()
-    delete this.clients[conn.address]
+  onCloseConnection = (inetAddr, reason) => {
+    this.conLog('Connection closed: ', inetAddr?.address, reason)
+
+    delete this.clients[inetAddr]?.connection // Prevent close loop
+    this.clients[inetAddr?.address ?? inetAddr]?.close()
+    delete this.clients[inetAddr]
     this.clientCount--
   }
 
@@ -117,9 +102,8 @@ class Server extends EventEmitter {
     return this.advertisement
   }
 
-  async listen () {
-    const { host, port, maxPlayers } = this.options
-    this.raknet = new this.RakServer({ host, port, maxPlayers }, this)
+  async listen (host = this.options.host, port = this.options.port) {
+    this.raknet = new this.RakServer({ host, port }, this)
 
     try {
       await this.raknet.listen()
diff --git a/src/serverPlayer.js b/src/serverPlayer.js
index 2e8ea77..ffb1961 100644
--- a/src/serverPlayer.js
+++ b/src/serverPlayer.js
@@ -10,7 +10,6 @@ class Player extends Connection {
   constructor (server, connection) {
     super()
     this.server = server
-    this.features = server.features
     this.serializer = server.serializer
     this.deserializer = server.deserializer
     this.connection = connection
@@ -24,16 +23,14 @@ class Player extends Connection {
     this.status = ClientStatus.Authenticating
 
     if (isDebug) {
-      this.inLog = (...args) => debug('-> S', ...args)
-      this.outLog = (...args) => debug('<- S', ...args)
+      this.inLog = (...args) => debug('S ->', ...args)
+      this.outLog = (...args) => debug('S <-', ...args)
     }
 
-    this.batchHeader = this.server.batchHeader
     // Compression is server-wide
     this.compressionAlgorithm = this.server.compressionAlgorithm
     this.compressionLevel = this.server.compressionLevel
     this.compressionThreshold = this.server.compressionThreshold
-    this.compressionHeader = this.server.compressionHeader
 
     this._sentNetworkSettings = false // 1.19.30+
   }
@@ -51,7 +48,6 @@ class Player extends Connection {
       client_throttle_scalar: 0
     })
     this._sentNetworkSettings = true
-    this.compressionReady = true
   }
 
   handleClientProtocolVersion (clientVersion) {
@@ -78,18 +74,11 @@ class Player extends Connection {
 
     // Parse login data
     const tokens = body.params.tokens
+    const authChain = JSON.parse(tokens.identity)
+    const skinChain = tokens.client
+
     try {
-      const skinChain = tokens.client
-      const authChain = JSON.parse(tokens.identity)
-      let chain
-      if (authChain.Certificate) { // 1.21.90+
-        chain = JSON.parse(authChain.Certificate).chain
-      } else if (authChain.chain) {
-        chain = authChain.chain
-      } else {
-        throw new Error('Invalid login packet: missing chain or Certificate')
-      }
-      var { key, userData, skinData } = this.decodeLoginJWT(chain, skinChain) // eslint-disable-line
+      var { key, userData, skinData } = this.decodeLoginJWT(authChain.chain, skinChain) // eslint-disable-line
     } catch (e) {
       debug(this.address, e)
       this.disconnect('Server authentication error')
@@ -126,8 +115,7 @@ class Player extends Connection {
     if (this.status === ClientStatus.Disconnected) return
     this.write('disconnect', {
       hide_disconnect_screen: hide,
-      message: reason,
-      filtered_message: ''
+      message: reason
     })
     this.server.conLog('Kicked ', this.connection?.address, reason)
     setTimeout(() => this.close('kick'), 100) // Allow time for message to be recieved.
@@ -164,7 +152,7 @@ class Player extends Connection {
       return
     }
 
-    this.inLog?.(des.data.name, serialize(des.data.params))
+    this.inLog?.(des.data.name, serialize(des.data.params).slice(0, 200))
 
     switch (des.data.name) {
       // This is the first packet on 1.19.30 & above
diff --git a/src/transforms/encryption.js b/src/transforms/encryption.js
index ff067cc..b02351b 100644
--- a/src/transforms/encryption.js
+++ b/src/transforms/encryption.js
@@ -36,10 +36,7 @@ function createEncryptor (client, iv) {
   // The send counter is represented as a little-endian 64-bit long and incremented after each packet.
 
   function process (chunk) {
-    const compressed = Zlib.deflateRawSync(chunk, { level: client.compressionLevel })
-    const buffer = client.features.compressorInHeader
-      ? Buffer.concat([Buffer.from([0]), compressed])
-      : compressed
+    const buffer = Zlib.deflateRawSync(chunk, { level: client.compressionLevel })
     const packet = Buffer.concat([buffer, computeCheckSum(buffer, client.sendCounter, client.secretKeyBytes)])
     client.sendCounter++
     client.cipher.write(packet)
@@ -73,22 +70,7 @@ function createDecryptor (client, iv) {
       return
     }
 
-    let buffer
-    if (client.features.compressorInHeader) {
-      switch (packet[0]) {
-        case 0:
-          buffer = Zlib.inflateRawSync(packet.slice(1), { chunkSize: 512000 })
-          break
-        case 255:
-          buffer = packet.slice(1)
-          break
-        default:
-          client.emit('error', Error(`Unsupported compressor: ${packet[0]}`))
-      }
-    } else {
-      buffer = Zlib.inflateRawSync(packet, { chunkSize: 512000 })
-    }
-
+    const buffer = Zlib.inflateRawSync(chunk, { chunkSize: 512000 })
     client.onDecryptedPacket(buffer)
   }
 
diff --git a/src/transforms/framer.js b/src/transforms/framer.js
index a2d9c4f..2452f01 100644
--- a/src/transforms/framer.js
+++ b/src/transforms/framer.js
@@ -3,15 +3,12 @@ const zlib = require('zlib')
 
 // Concatenates packets into one batch packet, and adds length prefixs.
 class Framer {
-  constructor (client) {
+  constructor (compressor, compressionLevel, compressionThreshold) {
     // Encoding
     this.packets = []
-    this.batchHeader = client.batchHeader
-    this.compressor = client.compressionAlgorithm || 'none'
-    this.compressionLevel = client.compressionLevel
-    this.compressionThreshold = client.compressionThreshold
-    this.compressionHeader = client.compressionHeader || 0
-    this.writeCompressor = client.features.compressorInHeader && client.compressionReady
+    this.compressor = compressor || 'none'
+    this.compressionLevel = compressionLevel
+    this.compressionThreshold = compressionThreshold
   }
 
   // No compression in base class
@@ -24,46 +21,30 @@ class Framer {
   }
 
   static decompress (algorithm, buffer) {
-    switch (algorithm) {
-      case 0:
-      case 'deflate':
-        return zlib.inflateRawSync(buffer, { chunkSize: 512000 })
-      case 1:
-      case 'snappy':
-        throw Error('Snappy compression not implemented')
-      case 'none':
-      case 255:
-        return buffer
-      default: throw Error('Unknown compression type ' + algorithm)
+    try {
+      switch (algorithm) {
+        case 'deflate': return zlib.inflateRawSync(buffer, { chunkSize: 512000 })
+        case 'snappy': throw Error('Snappy compression not implemented')
+        case 'none': return buffer
+        default: throw Error('Unknown compression type ' + this.compressor)
+      }
+    } catch {
+      return buffer
     }
   }
 
-  static decode (client, buf) {
+  static decode (compressor, buf) {
     // Read header
-    if (this.batchHeader && buf[0] !== this.batchHeader) throw Error(`bad batch packet header, received: ${buf[0]}, expected: ${this.batchHeader}`)
+    if (buf[0] !== 0xfe) throw Error('bad batch packet header ' + buf[0])
     const buffer = buf.slice(1)
-    // Decompress
-    let decompressed
-    if (client.features.compressorInHeader && client.compressionReady) {
-      decompressed = this.decompress(buffer[0], buffer.slice(1))
-    } else {
-      // On old versions, compressor is session-wide ; failing to decompress
-      // a packet will assume it's not compressed
-      try {
-        decompressed = this.decompress(client.compressionAlgorithm, buffer)
-      } catch (e) {
-        decompressed = buffer
-      }
-    }
+    const decompressed = this.decompress(compressor, buffer)
     return Framer.getPackets(decompressed)
   }
 
   encode () {
     const buf = Buffer.concat(this.packets)
-    const shouldCompress = buf.length > this.compressionThreshold
-    const header = this.batchHeader ? [this.batchHeader] : []
-    if (this.writeCompressor) header.push(shouldCompress ? this.compressionHeader : 255)
-    return Buffer.concat([Buffer.from(header), shouldCompress ? this.compress(buf) : buf])
+    const compressed = (buf.length > this.compressionThreshold) ? this.compress(buf) : buf
+    return Buffer.concat([Buffer.from([0xfe]), compressed])
   }
 
   addEncodedPacket (chunk) {
diff --git a/src/transforms/serializer.js b/src/transforms/serializer.js
index 8fffc42..91d4c97 100644
--- a/src/transforms/serializer.js
+++ b/src/transforms/serializer.js
@@ -37,6 +37,7 @@ function createProtocol (version) {
   const compiler = new ProtoDefCompiler()
   compiler.addTypesToCompile(protocol.types)
   compiler.addTypes(require('../datatypes/compiler-minecraft'))
+  compiler.addTypes(require('prismarine-nbt/zigzag').compiler)
 
   const compiledProto = compiler.compileProtoDefSync()
   return compiledProto
@@ -46,6 +47,7 @@ function createProtocol (version) {
 function getProtocol (version) {
   const compiler = new ProtoDefCompiler()
   compiler.addTypes(require(join(__dirname, '../datatypes/compiler-minecraft')))
+  compiler.addTypes(require('prismarine-nbt/zigzag').compiler)
 
   global.PartialReadError = require('protodef/src/utils').PartialReadError
   const compile = (compiler, file) => require(file)(compiler.native)
diff --git a/test/internal.js b/test/internal.js
index ffb403e..6b37d95 100644
--- a/test/internal.js
+++ b/test/internal.js
@@ -14,7 +14,7 @@ function prepare (version) {
 
 async function startTest (version = CURRENT_VERSION, ok) {
   await prepare(version)
-  // const Item = require('../types/Item')(version)
+  const Item = require('../types/Item')(version)
   const port = await getPort()
   const server = new Server({ host: '0.0.0.0', port, version, offline: true })
 
@@ -47,7 +47,6 @@ async function startTest (version = CURRENT_VERSION, ok) {
         must_accept: false,
         has_scripts: false,
         behaviour_packs: [],
-        world_template: { uuid: '550e8400-e29b-41d4-a716-446655440000', version: '' }, // 1.21.50
         texture_packs: [],
         resource_pack_links: []
       })
@@ -57,17 +56,13 @@ async function startTest (version = CURRENT_VERSION, ok) {
         client.write('network_settings', { compression_threshold: 1 })
         // Send some inventory slots
         for (let i = 0; i < 3; i++) {
-          // client.queue('inventory_slot', { window_id: 'armor', slot: 0, item: new Item().toBedrock() })
+          client.queue('inventory_slot', { window_id: 'armor', slot: 0, item: new Item().toBedrock() })
         }
 
         // client.queue('inventory_transaction', get('packets/inventory_transaction.json'))
         client.queue('player_list', get('packets/player_list.json'))
         client.queue('start_game', get('packets/start_game.json'))
-        if (client.versionLessThan('1.21.60')) {
-          client.queue('item_component', { entries: [] })
-        } else {
-          client.queue('item_registry', get('packets/item_registry.json'))
-        }
+        client.queue('item_component', { entries: [] })
         client.queue('set_spawn_position', get('packets/set_spawn_position.json'))
         client.queue('set_time', { time: 5433771 })
         client.queue('set_difficulty', { difficulty: 1 })
@@ -101,11 +96,11 @@ async function startTest (version = CURRENT_VERSION, ok) {
 
         loop = setInterval(() => {
           client.write('network_chunk_publisher_update', { coordinates: { x: 646, y: 130, z: 77 }, radius: 64 })
-        }, 6500)
+        }, 9500)
 
         setTimeout(() => {
           client.write('play_status', { status: 'player_spawn' })
-        }, 3000)
+        }, 6000)
 
         // Respond to tick synchronization packets
         client.on('tick_sync', (packet) => {
diff --git a/test/internal.test.js b/test/internal.test.js
index 271a7c5..1b6250c 100644
--- a/test/internal.test.js
+++ b/test/internal.test.js
@@ -3,7 +3,6 @@
 const { timedTest } = require('./internal')
 const { testedVersions } = require('../src/options')
 const { sleep } = require('../src/datatypes/util')
-require('events').captureRejections = true
 
 describe('internal client/server test', function () {
   const vcount = testedVersions.length
diff --git a/test/proxy.js b/test/proxy.js
index af443d7..345e89f 100644
--- a/test/proxy.js
+++ b/test/proxy.js
@@ -22,12 +22,12 @@ function proxyTest (version, raknetBackend = 'raknet-native', timeout = 1000 * 4
         console.debug('Client has authenticated')
         setTimeout(() => {
           client.disconnect('Hello world !')
-        }, 500) // allow some time for client to connect
+        }, 1000) // allow some time for client to connect
       })
     })
 
     console.debug('Server started', server.options.version)
-    await new Promise(resolve => setTimeout(resolve, 500))
+    await new Promise(resolve => setTimeout(resolve, 1000))
 
     const relay = new Relay({
       version,
@@ -46,7 +46,7 @@ function proxyTest (version, raknetBackend = 'raknet-native', timeout = 1000 * 4
     await relay.listen()
 
     console.debug('Proxy started', server.options.version)
-    await new Promise(resolve => setTimeout(resolve, 500))
+    await new Promise(resolve => setTimeout(resolve, 1000))
 
     const client = createClient({ host: '127.0.0.1', port: CLIENT_PORT, version, username: 'Boat', offline: true, raknetBackend, skipPing: true })
     console.debug('Client started')
@@ -58,7 +58,7 @@ function proxyTest (version, raknetBackend = 'raknet-native', timeout = 1000 * 4
       server.close()
       relay.close()
       console.log('✔ OK')
-      sleep(200).then(res)
+      sleep(500).then(res)
     })
   }, timeout, () => { throw Error('timed out') })
 }
diff --git a/test/proxy.test.js b/test/proxy.test.js
index 27761ae..70ea5f1 100644
--- a/test/proxy.test.js
+++ b/test/proxy.test.js
@@ -11,7 +11,7 @@ describe('proxies client/server', function () {
     it('proxies ' + version, async () => {
       console.debug(version)
       await proxyTest(version)
-      await sleep(100)
+      await sleep(1000)
       console.debug('Done', version)
     })
   }
diff --git a/test/util.js b/test/util.js
index 3325863..2876a67 100644
--- a/test/util.js
+++ b/test/util.js
@@ -5,12 +5,7 @@ const getPort = () => new Promise(resolve => {
   server.listen(0, '127.0.0.1')
   server.on('listening', () => {
     const { port } = server.address()
-    server.close(() => {
-      // Wait a bit for port to free as we try to bind right after freeing it
-      setTimeout(() => {
-        resolve(port)
-      }, 200)
-    })
+    server.close(() => resolve(port))
   })
 })
 
diff --git a/test/vanilla.js b/test/vanilla.js
index 73a5f44..7a24008 100644
--- a/test/vanilla.js
+++ b/test/vanilla.js
@@ -5,12 +5,11 @@ const { waitFor } = require('../src/datatypes/util')
 const { getPort } = require('./util')
 
 async function test (version) {
-  // const ChunkColumn = require('bedrock-provider').chunk('bedrock_' + (version.includes('1.19') ? '1.18.30' : version)) // TODO: Fix prismarine-chunk
+  const ChunkColumn = require('bedrock-provider').chunk('bedrock_' + (version.includes('1.19') ? '1.18.30' : version)) // TODO: Fix prismarine-chunk
 
   // Start the server, wait for it to accept clients, throws on timeout
-  const [port, v6] = [await getPort(), await getPort()]
-  console.log('Starting vanilla server', version, 'on port', port, v6)
-  const handle = await vanillaServer.startServerAndWait2(version, 1000 * 220, { 'server-port': port, 'server-portv6': v6 })
+  const port = await getPort()
+  const handle = await vanillaServer.startServerAndWait2(version, 1000 * 220, { 'server-port': port })
   console.log('Started server')
 
   const client = new Client({
@@ -49,10 +48,10 @@ async function test (version) {
         client.queue('tick_sync', { request_time: BigInt(Date.now()), response_time: BigInt(Date.now()) })
       }, 200)
 
-      // client.on('level_chunk', async packet => { // Chunk read test
-      //   const cc = new ChunkColumn(packet.x, packet.z)
-      //   await cc.networkDecodeNoCache(packet.payload, packet.sub_chunk_count)
-      // })
+      client.on('level_chunk', async packet => { // Chunk read test
+        const cc = new ChunkColumn(packet.x, packet.z)
+        await cc.networkDecodeNoCache(packet.payload, packet.sub_chunk_count)
+      })
 
       console.log('Awaiting join')
 
diff --git a/tools/compileProtocol.js b/tools/compileProtocol.js
index a7c3aa0..dcf6545 100644
--- a/tools/compileProtocol.js
+++ b/tools/compileProtocol.js
@@ -15,6 +15,7 @@ function createProtocol (version) {
   const compiler = new ProtoDefCompiler()
   const protocol = mcData('bedrock_' + version).protocol.types
   compiler.addTypes(require('../src/datatypes/compiler-minecraft'))
+  compiler.addTypes(require('prismarine-nbt/zigzag').compiler)
   compiler.addTypesToCompile(protocol)
 
   fs.writeFileSync('./read.js', 'module.exports = ' + compiler.readCompiler.generate().replace('() =>', 'native =>'))
@@ -38,7 +39,7 @@ require('minecraft-data/bin/generate_data')
 
 // If no argument, build everything
 if (!process.argv[2]) {
-  convert('bedrock', 'latest')
+  convert('latest')
   for (const version of versions) {
     main(version)
   }
diff --git a/tools/genPacketDumps.js b/tools/genPacketDumps.js
index f0edbfe..2e6420f 100644
--- a/tools/genPacketDumps.js
+++ b/tools/genPacketDumps.js
@@ -24,7 +24,7 @@ async function dump (version, force = true) {
   const random = (Math.random() * 1000) | 0
   const [port, v6] = [await getPort(), await getPort()]
 
-  console.log('Starting dump server', version, 'on port', port, v6)
+  console.log('Starting dump server', version)
   const handle = await vanillaServer.startServerAndWait2(version || CURRENT_VERSION, 1000 * 120, { 'server-port': port, 'server-portv6': v6 })
 
   console.log('Started dump server', version)
diff --git a/tools/startVanillaServer.js b/tools/startVanillaServer.js
index 828e332..6d77006 100644
--- a/tools/startVanillaServer.js
+++ b/tools/startVanillaServer.js
@@ -1,11 +1,156 @@
-const bedrockServer = require('minecraft-bedrock-server')
+const http = require('https')
+const fs = require('fs')
+const cp = require('child_process')
+const debug = process.env.CI ? console.debug : require('debug')('minecraft-protocol')
+const https = require('https')
+const { getFiles, waitFor } = require('../src/datatypes/util')
 
-module.exports = {
-  ...bedrockServer,
-  startServerAndWait (version, withTimeout, options) {
-    return bedrockServer.startServerAndWait(version, withTimeout, { ...options, root: __dirname })
-  },
-  startServerAndWait2 (version, withTimeout, options) {
-    return bedrockServer.startServerAndWait2(version, withTimeout, { ...options, root: __dirname })
+function head (url) {
+  return new Promise((resolve, reject) => {
+    const req = http.request(url, { method: 'HEAD', timeout: 1000 }, resolve)
+    req.on('error', reject)
+    req.on('timeout', () => { req.destroy(); debug('HEAD request timeout'); reject(new Error('timeout')) })
+    req.end()
+  })
+}
+function get (url, outPath) {
+  const file = fs.createWriteStream(outPath)
+  return new Promise((resolve, reject) => {
+    https.get(url, { timeout: 1000 * 20 }, response => {
+      if (response.statusCode !== 200) return reject(new Error('Server returned code ' + response.statusCode))
+      response.pipe(file)
+      file.on('finish', () => {
+        file.close()
+        resolve()
+      })
+    })
+  })
+}
+
+// Get the latest versions
+// TODO: once we support multi-versions
+function fetchLatestStable () {
+  get('https://raw.githubusercontent.com/minecraft-linux/mcpelauncher-versiondb/master/versions.json', 'versions.json')
+  const versions = JSON.parse(fs.readFileSync('./versions.json'))
+  const latest = versions[0]
+  return latest.version_name
+}
+
+// Download + extract vanilla server and enter the directory
+async function download (os, version, path = 'bds-') {
+  debug('Downloading server', os, version, 'into', path)
+  process.chdir(__dirname)
+  const verStr = version.split('.').slice(0, 3).join('.')
+  const dir = path + version
+
+  if (fs.existsSync(dir) && getFiles(dir).length) {
+    process.chdir(path + version) // Enter server folder
+    return verStr
+  }
+  try { fs.mkdirSync(dir) } catch { }
+
+  process.chdir(path + version) // Enter server folder
+  const url = (os, version) => `https://minecraft.azureedge.net/bin-${os}/bedrock-server-${version}.zip`
+
+  let found = false
+
+  for (let i = 0; i < 8; i++) { // Check for the latest server build for version (major.minor.patch.BUILD)
+    const u = url(os, `${verStr}.${String(i).padStart(2, '0')}`)
+    debug('Opening', u, Date.now())
+    let ret
+    try { ret = await head(u) } catch (e) { continue }
+    if (ret.statusCode === 200) {
+      found = u
+      debug('Found server', ret.statusCode)
+      break
+    }
+  }
+  if (!found) throw Error('did not find server bin for ' + os + ' ' + version)
+  console.info('🔻 Downloading', found)
+  await get(found, 'bds.zip')
+  console.info('⚡ Unzipping')
+  // Unzip server
+  if (process.platform === 'linux') cp.execSync('unzip -u bds.zip && chmod +777 ./bedrock_server')
+  else cp.execSync('tar -xf bds.zip')
+  return verStr
+}
+
+const defaultOptions = {
+  'level-generator': '2',
+  'server-port': '19130',
+  'online-mode': 'false'
+}
+
+// Setup the server
+function configure (options = {}) {
+  const opts = { ...defaultOptions, ...options }
+  let config = fs.readFileSync('./server.properties', 'utf-8')
+  config += '\nplayer-idle-timeout=1\nallow-cheats=true\ndefault-player-permission-level=operator'
+  for (const o in opts) config += `\n${o}=${opts[o]}`
+  fs.writeFileSync('./server.properties', config)
+}
+
+function run (inheritStdout = true) {
+  const exe = process.platform === 'win32' ? 'bedrock_server.exe' : './bedrock_server'
+  return cp.spawn(exe, inheritStdout ? { stdio: 'inherit' } : {})
+}
+
+let lastHandle
+
+// Run the server
+async function startServer (version, onStart, options = {}) {
+  const os = process.platform === 'win32' ? 'win' : process.platform
+  if (os !== 'win' && os !== 'linux') {
+    throw Error('unsupported os ' + os)
+  }
+  await download(os, version, options.path)
+  configure(options)
+  const handle = lastHandle = run(!onStart)
+  handle.on('error', (...a) => {
+    console.warn('*** THE MINECRAFT PROCESS CRASHED ***', a)
+    handle.kill('SIGKILL')
+  })
+  if (onStart) {
+    let stdout = ''
+    handle.stdout.on('data', data => {
+      stdout += data
+      if (stdout.includes('Server started')) onStart()
+    })
+    handle.stdout.pipe(process.stdout)
+    handle.stderr.pipe(process.stdout)
+  }
+  return handle
+}
+
+// Start the server and wait for it to be ready, with a timeout
+async function startServerAndWait (version, withTimeout, options) {
+  let handle
+  await waitFor(async res => {
+    handle = await startServer(version, res, options)
+  }, withTimeout, () => {
+    handle?.kill()
+    throw new Error(`Server did not start on time (${withTimeout}ms, now ${Date.now()})`)
+  })
+  return handle
+}
+
+async function startServerAndWait2 (version, withTimeout, options) {
+  try {
+    return await startServerAndWait(version, 1000 * 60, options)
+  } catch (e) {
+    console.log(e)
+    console.log('^ Tring once more to start server in 10 seconds...')
+    lastHandle?.kill()
+    await new Promise(resolve => setTimeout(resolve, 10000))
+    process.chdir(__dirname)
+    fs.rmSync('bds-' + version, { recursive: true })
+    return await startServerAndWait(version, withTimeout, options)
   }
 }
+
+if (!module.parent) {
+  // if (process.argv.length < 3) throw Error('Missing version argument')
+  startServer(process.argv[2] || '1.17.10', null, process.argv[3] ? { 'server-port': process.argv[3], 'online-mode': !!process.argv[4] } : undefined)
+}
+
+module.exports = { fetchLatestStable, startServer, startServerAndWait, startServerAndWait2 }