missing robot bottom

I was starting to do the puzzle room after the elevator. My robot died because I forgot how to fight and by the time I figured it out I was dead. I was resetting to a previous version and went back a few times, then forward. When I stopped, his bottom section was missing. I tried resetting the checkpoint back and forward, but it stayed gone.

after dying again and resetting, the missing robot parts rematerialized.

Thanks for the bug! If I understand correctly, that bug occurs when you warp from checkpoints to checkpoints?