I have noticed when it goes to the bank it suppose to withdraw 2 p pots (4). I have still got either a vial or a p pot (1) from the previous trip in invent, it either drops the vial or banks it but misclicks the p pot (1) and then still tries to withdraw both p pots (4) when it can only withdraw 1 as it hasnt enough room for the two. It will then keep clicking the p pot (4) in bank as if it has space.