When walking in Myrellion deep caverns the game randomly crashes with an error message. It’s happened to me 10 times so far, I have to set auto save to every in game hour to make any progress so I won’t lose progress when it crashes.
I think I may have fixed this; one of the rooms in the deep caves (specifically "2G11") had an incorrect locked condition value that was blowing up the autopathing system. I suspect it was the same room.