Badly compressed packet size of 2 is below server threshold of 256

[00:08:57] [Server thread/INFO]: SuperMenu lost connection: Internal Exception: io.netty.handler.codec.DecoderException: Badly compressed packet - size of 2 is below server threshold of 256

After installing this plug-in, it is difficult to connect to the server. Always remind the above

This is an issue when the server is in offline mode.
This bug won't get fixed as we don't support pirating the game.

This is an issue when the server is in offline mode.

@henkelmax, can you explain why is this happening?

This is an issue when the server is in offline mode.

@henkelmax, can you explain why is this happening?

This is the login networking of MC:
https://wiki.vg/Protocol#Login

The voice chat login packet is sent when Login Start is sent.
Normally there is enough time until Set Compression is sent, but because offline mode does not send the Encryption Request packet because offline mode is unencrypted, there is a race condition, because the packet would arrive uncompressed, but compression is already set at that point.