Abridged: Force close player inventories when they move/interact This prevents modified clients from using the 2x2 crafting square as permanent storage Force Close Inventory On Move SpigotMC/Spigot@db78a70788 Only close once, if needed SpigotMC/Spigot@b652de8e7f Move to interact event closing SpigotMC/Spigot@b5378850d3 Disregard arm swings - racy SpigotMC/Spigot@f86634e280