Use a real watch in nicer occasions. Apple Watch for all other times.

I have both, SE totally fine if you don’t need the additional heart monitoring features.

Delete third party apps, specifically Moby Face App. Had the same problem.

I can add my wife’s latest Series 9 was partially affected but appears fine for now, also I have read a lot of other user’s some of which have the Ultra who are affected. It doesn’t seem to be everybody but it sure is a lot of people and models. I do not want to test it on my other older watch models and mess those up (not all can be updated to this version but anyhow).