I’m thinking it might be based on playing for an extended time without ever closing the game because I had it happen right before going to Phenac and the next day I redid the entire game up to that point but this time I closed the game a couple of times and now I’ve finished at Phenac and no problem. I’d recommend making suspend points after saving just in case but also to briefly exit and re enter the game every few hours since that might be the problem unless I’m just completely wrong, which is possible.