Fixes
- Fixed backpack to return empty item handler when something tries to get item handler capability from it and the backpack doesn't have a storage uuid assigned yet. This prevents creation of unnecessary storage ids and records in cases where the backpack stack may be a copy and thus newly created storage id won't be retained on it.
Fixes
- Fixed an issue where backpack contents would be created unnecessarily on the client side and change the way backpacks with jukebox upgrade are dropped from mobs so that these also clean up backpack contents and keep the jukebox items on the stack itself until they are open by a player for the first time