[Fabric 1.21.1] Using the belt items overwrites the hotbar item.

[M4Lfunct10n]

I've reproduced this twice now, (unfortunately I lost a nicely enchanted weapon) by using a tool on the utility belt. I swap from one of my hotbar items to the tool in my belt (toggle or hold, both do it) and as soon as I start using it for mining/digging etc, it duplicates itself onto the hotbar slot of the item I was using before moving to the belt tool. This both erases the item on the hotbar as well as creates a duplicate of the item I'm using in the belt.

[Jamalam360]

What Minecraft/Utility Belt version are you using?

[Jamalam360]

Oh, I did not read the issue title properly...will look into this now

[Jamalam360]

This is my attempt to reproduce the issue: https://streamable.com/99jspp

Not sure how to reproduce it

[fakekittensarenotreal]

I also have this issue and I am not sure what causes it. I have lost a few items now due to it, and will update if I have suspicions of a cause.

[fakekittensarenotreal]

I've reproduced this twice now, (unfortunately I lost a nicely enchanted weapon) by using a tool on the utility belt. I swap from one of my hotbar items to the tool in my belt (toggle or hold, both do it) and as soon as I start using it for mining/digging etc, it duplicates itself onto the hotbar slot of the item I was using before moving to the belt tool. This both erases the item on the hotbar as well as creates a duplicate of the item I'm using in the belt.

potentially it is caused by an optimization mod? I will remove the ones I recently added and get back to you.