Fix this bug guys

Your in-game name: vKridosTheBee
What is the bug report? Inventory ( maybe come help fix this bug, when u have backpack and full slots 8/8 u can use item, but u not losing it from inventory, cant drop too.
When drop u not lose too..)
Screenshot or video: can record if u need.
Extra comments:

Fixed. Can be locked, ty

Locked.