And it doesn't go away

Please try without your hacked client

@Earthcomputer

Please give more information, like the multiconnect version you are running and the server you are connecting to, and what protocol you are connecting with.

Server: 6g6s
Version: latest
Protokol: I don't know what you mean by protocol. Maybe you mean how I connect?
I connect at 6g6s.xyz

Excuse me, multiconnect version 1.4.16

Please specify what the multiconnect version actually is rather than saying "latest", I don't want to come back here in 2 years time and figure out what the latest version was when you posted that comment.
Protocol is what version are you connecting with (might be 1.12.2 for example)

Protokol 1.12.2 Version multiconnect for 1.17.1

That's the Minecraft version, what's the multiconnect version?

If this is for me, my friend also tried to log into the same server with the same version of both mod and minecraft and the same result

Can anyone else reproduce this?

I tested this, the problem actually exists.

Demo:
[1] [2]

Logs:
latest.log

will it be fixed?

Not right now, 1.18 is close to release

ok

This issue is unlikely to occur after the rewrite. Please respond if it does.