Same issue here. Any attempt to return to Rivington gets to 33% and crashes (I'm on PS5.)
I've only done some of the sewer section (haven't fought orin) haven't done ANYTHING in the actual lower city. None of the bodies down there (even checked all the cranium rats) are showing more than 0hp.
Judging from what others have posted, I'm assuming there's an NPC/watcher body somewhere in Rivington that is messing with my save, but I can't actually get back there to do anything about it.
Yeah, it'll be a body in Rivington. I think the only thing you can do is to submit a bug report to Larian to add to the weight of people who need this fixed...
