On my second run in coop, the crystal bot got stuck. He needed to move two maps left to go to next sector. But on the first map on the left that was the map with a big starship in the center (there is only one map like this), the crystal bot go stuck on the right arm of the starship, moving indefinitely left and right on the same spot. We tryed everything to unstuck it but it was impossible and we lost the run after few minutes defending.