My settings app is broken - searching for options doesn't work and can lead to a crash. It is not fixed by restarting.
I did a fresh install and made no changes to my owner user. On a different user, I used a backup from a Pixel 5.
I then started using the phone and noticed very strong jitters in moving icons and windows. After that occurred, I changed some settings in the owner user too:
I switched the smooth display option on and off, I set the desktop to 4x4 icons instead of 5x5. I also allowed desktop rotation for the wallpaper.
Soon after that, trying to fix my jitters, I wanted to try forcing the maximum frame rate via the developer options and I noticed that the settings app didn't work properly.
Resetting all these options (including developer options) did not solve the problem. Do you have any ideas apart from a factory reset?
Can restoring a backup on a different user break your system that way?
Is the Pixel 7a just not supported as well as older models yet?
I also get a very stretched background image only on Pixel 7a, but I doubt that this problem is related.