What happened?

When used alongside BetterEnd, putting an item in an Anvil crashes the game.

This was tested.

Note: Bug is for Minecraft 1.21, not 1.20.4

BetterNether

21.0.3

BCLib

21.0.3

Fabric API

0.100.4+1.21

Fabric Loader

0.15.11

Minecraft

1.20.4

Relevant log output

No response

Other Mods

- BetterEnd