I will be playing and the game will just crash unexpectedly while exploring. Whenever it crashes I look at the logs and it looks like this mod is always the last process running when the game crashes and it shows its throwing alot of errors.

https://gist.github.com/Minebrah/5b9662bd78dedb7d033f3c8008712fe4

[02Dec2024 10:29:20.862] [Server thread/ERROR] [zeta/]: For more info enable Creative Verbose Logging in the Zeta config, or set Force Creative Tab Appends to true to disable this behavior
[02Dec2024 10:29:20.862] [Server thread/ERROR] [zeta/]: Creative tab loop found when adding Block{quark:monster_box} next to Block{minecraft:spawner}
[02Dec2024 10:29:20.862] [Server thread/ERROR] [zeta/]: For more info enable Creative Verbose Logging in the Zeta config, or set Force Creative Tab Appends to true to disable this behavior
[02Dec2024 10:29:20.863] [Server thread/ERROR] [zeta/]: Creative tab loop found when adding Block{quark:monster_box} next to Block{minecraft:spawner}
[02Dec2024 10:29:20.863] [Server thread/ERROR] [zeta/]: For more info enable Creative Verbose Logging in the Zeta config, or set Force Creative Tab Appends to true to disable this behavior
[02Dec2024 10:29:20.863] [Server thread/ERROR] [zeta/]: Creative tab loop found when adding Block{quark:monster_box} next to Block{minecraft:spawner}
[02Dec2024 10:29:20.863] [Server thread/ERROR] [zeta/]: For more info enable Creative Verbose Logging in the Zeta config, or set Force Creative Tab Appends to true to disable this behavior
[02Dec2024 10:29:20.863] [Server thread/ERROR] [zeta/]: Creative tab loop found when adding Block{quark:monster_box} next to Block{minecraft:spawner}
[02Dec2024 10:29:20.863] [Server thread/ERROR] [zeta/]: For more info enable Creative Verbose Logging in the Zeta config, or set Force Creative Tab Appends to true to disable this behavior
[02Dec2024 10:29:36.086] [Server thread/WARN] [net.minecraft.server.MinecraftServer/]: Can't keep up! Is the server overloaded? Running 15319ms or 306 ticks behind

No idea what's happening here, the linked log doesn't contain anything from Zeta, doesn't contain a crash, and doesn't contain the "creative tab loop found" stuff either.

IIUC Zeta prints this message when it has trouble injecting something into a creative tab but it's not a hard error

Hey,

1.20.1 here as well. Pushing a sticky piston with two slime blocks attached also completely crashes my server and singleplayer game. I dont have the exact error on me but it was caused by the Zeta update and was a concurrent modification exception.

Pushing a sticky piston with two slime blocks attached also completely crashes my server and singleplayer game.

Has absolutely nothing to do with this issue.

[02Dec2024 10:29:36.086] [Server thread/WARN] [net.minecraft.server.MinecraftServer/]: Can't keep up! Is the server overloaded? Running 15319ms or 306 ticks behind

Oh it's just the game getting lagged out while exploring. The message is annoying and we should fix it, but

or set Force Creative Tab Appends to true to disable this behavior

it tells you how to turn off the message & it's not crashing anything