Failed to decode packet cookie_request

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Versions

• minecraft-protocol: 1.55.0
• server: vanilla/spigot/paper 1.21.4
• node: 22.14.0

Detailed description of a problem

I'm trying to set up a simple offline-mode server that (currently) only spawns the player in a void world. The following code works for other versions (tested for 1.8 with slight adaptations to the login packet, 1.18, 1.19 and 1.20 with the same code, different data versions). Attempting to run the same code with 1.21 results in the connection being lost and the following error being shown:

Internal Exception: io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:cookie_request'.

Current code

const mc = require("minecraft-protocol")
const mcData = require("minecraft-data")("1.21")

const server = mc.createServer({
  host: "127.0.0.1",
  port: 25565,
  version: "1.21",
  "online-mode": false,
})

server.on("login", (client) => {
  const p = mcData.loginPacket
  console.log(p)
  client.write("login", {
    ...p,
  })
  client.write("position", {
    x: 0,
    y: 0,
    z: 0,
    yaw: 0,
    pitch: 0,
  })
})

Expected behavior

The client should spawn in an empty world at the coordinates 0/0/0 immediately upon joining the server.

Reproduce the failure using the supplied createServer setup and the 1.21 login and position writes. Inspect how the 1.21 protocol handles the clientbound minecraft:cookie_request packet and compare it with the provided login packet data; done means a 1.21 client joins the offline-mode server and spawns at 0/0/0 without the decoder error.