I have a Galaxy S20 Ultra which I am soon replacing but I am preparing to hand down to another family member.
I was one of the unlucky people who had the original S20 Ultra camera focus issue which required the phone to be sent away for repair but since that happened I had not experienced any further camera issues... until now.
It mainly happens when using the fixed focal lengths of 1x and 2x which are both now blurred. You can sometimes fix the 1x blur by dropping to 0.9x (no such luck with 2x) but as you can imagine this is annoying as hell on two of the most used focal lengths.
The only thing I can think that has happened since I've noticed the problem occurring again is the recent 1st February 2023 security patch.
I'm at the point where owning Samsung products (and I have many) is really starting to annoy me. The only more annoying product I currently own is my truly awful Samsung dishwasher (best avoided).