That appears to be custom functionality in another mod that is managing some alternative inventories; this mod doesn't do anything like that, and can't know about it, so there's not much I can do. All this mod is doing is automatically filling add/remove request orders from things that are in Sandboxes - nothing to do with your inventory. It seems like the other mod is trying to automatically transfer between inventories, with the assumption that that's always valid. For example, with its custom/extra GUI, listening for clicks and performing a move operation.
You should raise that issue for the other mod involved.
