Version: lithium-fabric-mc1.18-0.7.6-SNAPSHOT.jar

How to reproduce: Open the game in 1.18.1, and open a singleplayer world.

Crash report: crash-2021-12-10_10.07.54-server.txt

Save: This happens in any world I create with Lithium, and any world created in Vanilla.

Additional Information: This crash does not happen with Lithium, and no other mods were installed when this crash occured.
The Minecraft Launcher states: "The game crashes whilst exception in server tick loop
Error: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_3898 failed
Exit Code: -1"
Newest fabric loader was used.
EDIT: The newest dev build fixed this bug.
"With the newest dev build the game doesn't crash, but now you'll be stuck on the "Saving World" screen when opening a world. The game also becomes unresponsive and must be closed with Task manager."
-Me before I realized it was actually because I was using a dev build of Sodium with Iris

Here too

This issue still persists with the latest dev build, this time it's stuck on the "Saving World" screen when you try to open a world. I'll change the title of the report to match the new issue.
Edit: i was dumb