Is there an existing issue for this?

• I have searched the existing issues

Observed behaviour

Hi,
The Server Crashes When Certain Items are used, and you cannot join anymore because it will crash, and a Backup needs to be loaded.

I don't know Which item Caused this issue.

Expected behaviour

After I Loaded the Backup I Expected it to Work Properly tho it Happens Again.

Steps to reproduce

I Don't Exactly know Which Item Causes this i Believe after something with SummonQuicksand was used.

Crashlog

<script src="https://gist.github.com/Maxi6104/63c7ae0b60ad7bba5206fca097c3dfd3.js"></script>

Environment (Singleplayer/Server, etc.)

LAN game/Server

Mod version

4.3.11

Minecraft version

1.12.2

Forge version

1.12.2 Forge - 14.23.5.2860

Other mods

No response