Something I've noticed over the last 6 weeks or so is that the S21 is skipping it's regularly scheduled reset roughly every other week. It's scheduled for 11pm every Saturday night. It did it last weekend but didn't this weekend. That's the pattern it's been following lately. I don't know if it was doing it before the Android 12 update or not. I can't exactly remember the exact time it skipped it for the first time.