Like wtf? Battery went from lasting all day to dropping like a stone after latest update that I had the misfortune to install earlier today. Don't you test these updates or do you just release them and hope for the best?
I've had exactly the same isssue with my A50. Spoken to Tech Support and Senior Tech Support who remotely accessed phone as they said the problem was my battery. Diagnostics showed battery was fine and it's One UI Home that's the problem. They told me to report it on here! I've wiped the caches and still useless.