I have noticed that also. The latest iPhone update screwed up several things on my phone, including autocorrect. I get notices things aren’t syncing and my phone no longer connects to my hearing aids.
EVERY "update" screws something around, and often up on my iPhone SE! And I don't need help in that department. Change models and it's even worse. We upgraded a month or so ago, wife to latest and greatest, me to the latest version of the SE, both of which required a learning curve.
It's very difficult, almost impossible ( for us)to use each other's phones except for the very basic stuff. I'm glad I don't use the other 90% of the crap on there!
I'm sure any 12 year old would have no prob with anything on either.