Hi!

Friends of mine have discovered an exploit to clone items on multiplayer. Here are the steps:

1. Player X puts items (e.g. blocks of diamond) in the backpack.
2. Player X puts the backpack on the ground.
3. Player Y opens the backpack.
4. Player X destroys the backpack.
5. Player Y still has the backpack open. (But when using vanilla chests, the window is automatically closed.)
6. Player X moves the items from the backpack to his inventory.
7. Player Y still has the backpack open. The items are still available for him, thus he can also collect the items resulting in doubled items.

I hope this is easy to fix as it's game breaking. Thank you for your work, it's really great! <3

Minecraft: 1.16.5
Forge: 36.0.48
MCP 20210115.111550
Mod version: 1.16.4-2.2.5.197

Fixed in the latest version that's on curseforge now.

Thank you for an extremely fast fix!