Minecraft version & Mod Version:
1.18 - RootsClassic-1.18-1.1.13

Single player or Server:
Single

Describe problem (what you were doing / what happened):
When a staff breaks after being used on offhand, the current slot that is highlighted in the mainhand will delete any items in it, until the staff is removed from the offhand.

Crash log (if any):

(If this is a suggestion and not a bug report, delete all this and just write your suggestion!)