[MC 1.20.6 - Protocol 1.49.0] nmp server: Failed to verify username

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Versions

• minecraft-protocol: 1.49.0
• server: vanilla/spigot/paper 1.20.6
• node: 20.10.0

Detailed description of a problem

When I'm trying to connect to the server with a client in version 1.20.6 and the server is using minecraft-protocol 1.49.0, I get the follow error in the client :

Current code

DEBUG CreateServer {
  'online-mode': true,
  motdMsg: { text: 'SleepingServer, waiting for his prince...' },
  port: 25565,
  maxPlayers: 20,
  version: false,
  beforePing: [Function: beforePing],
  validateChannelProtocol: true,
  errorHandler: [Function: errorHandler],
  enforceSecureProfile: true
}

Expected behavior

The connection is accepted, and it doesn't failed to verify the username.

Additional context

When I switch the "oneline-mode" to false:
DEBUG CreateServer { 'online-mode': false, motdMsg: { text: 'SleepingServer, waiting for his prince...' }, port: 25565, maxPlayers: 20, version: false, beforePing: [Function: beforePing], validateChannelProtocol: true, errorHandler: [Function: errorHandler], enforceSecureProfile: false }
The connection is handle but I got an error on the client side :

Thanks for your help & devotion and this package.

Have a nice day.

Start by reproducing the connection failure with minecraft-protocol 1.49.0, Node 20.10.0, and a vanilla, Spigot, or Paper 1.20.6 server using the supplied online-mode configuration. Compare the online-mode and offline-mode behavior; done means a 1.20.6 client can connect in online mode without the username-verification error.