When loading this save, a chunk of hot Igneous rock appears just below my grill. This is not melting debris or tiles, or conveyor rail glitches or anything else like that. The oxygen surrounding it is still at 30C during the pause after loading. I chose this save specifically (all the autosaves have this bug, so I can't give a comparison one without) because the tile in question is just barely on screen, so you can actually see it change from empty/oxygen to a tile of rock.
Steps to Reproduce
Load this save.
This issue has not been confirmed by a developer yet.