I noticed that after manually instigating a save, there’s a phase where the screen is darker and you can not move anything, after that, the screen goes back to normal and you can move again for a bit but only a little time later, the game will say “save complete” or something to that effect. And in that phase where you can move (but can also stand still), if you press escape, the save and load buttons are still greyed out. I assume that that was the critical phase where starting another save would wreck something. I can not confirm that though, but, for what it’s worth, I can say that I have had no corrupted saves since I disabled saves and pay attention to not start quicksaves before the game says save successful.
I also noticed that one patch since said that creating corrupted saves had been addressed, so maybe the whole thing would be moot now anyway.