https://cdn.discordapp.com/attachments/509421347714367491/545773393874649118/unknown.png

"There seems to be a glitch with Chalk stacking temporarily and then unstacking. It only seems to be problematic when using the chest sorting button here, as it deleted one of the two Focal Chalk I had."

It inherited that from old covens code, where damage was used to account for other things. We should both change that

I would suggest getting rid of the meta and switching to seperate item instances. Also, why is the durability a custom nbt tag? Use the builtin durability.