Bug in labyrinth-shooter in the head of old bot

[painz]

When you get to this shooting-maze the small dude gets stuck in the wall all the time here after going from one room to another.
Trying 3rd or 4rd time, its that place which looks like 3 or 4 lungs with a red dude each, they are all in one screen and they are connected together on the screen above. So once you go up from the leftmost you get stuck.