In act 4, when I save in Ten Thousand Delights, my savegame gets corrupted. I can save outside, and it's fine. I can enter and then leave and save outside again, and it's fine. But if I save inside, that particular save is corrupted and unloadable.

After the save fails to load, I'm dumped back to the title with the message Error: Collection was modified; enumeration operation may not execute. at System.ThrowHelper.ThrowInvalidOperationException (System.ExceptionResource resource) [0x0000b] in <eae584ce26bc40229c1b1aa476bfa589>:0

This game was started on 1.2.2, then updated to 1.3. I then did a number of respecs, including the main character, and there are two non-crashing secondary bugs visible - my prior build had the Azata path superpower Incredible Might, and even though I no longer have the power, the main character is still affected by it. The second part is that in the main character's weapon damage breakdown, the damage is not fully listed - I'm getting +20 damage but the breakdown only lists +10 from dex, +3 from enhancement, and +2 from weapon specialization, leaving the source of the last +5 not stated, though it's likely Incredible Might, because I'm at mythic level 5 and the +5 bonus to attack *is* listed.

Here are two save games - 10 is just outside Ten Thousand Delights and is good. 11 is seconds later, inside, and is bad.
https://gofile.io/d/EUSZ3i

That is possibly what broke my latest saves as well.
Saving in Noctulia's castle may not be the best idea.