On my bag 4 i have the 16 slot Enchanted Mageweave Pouch and when I try to sort bags, I get 5 messages with "That item doesn't go in that container." on middle of my screen and after that on the chat "BankStack: Confusion. Stopping."

I don't know how to help with other information, but if you give me a command that will capture the actions to see what items does it try to put in the Enchanting Bag, i will gladly post the outcomes of that command.

Edit: I fount that one of the culprit is the [Mageroyal] herb.

Best regards