I am running Ubuntu 22.04 with gnome 42.09 on 2 different systems and they both have the same problem. From time to time I will notice that the words across the top where the clock and calendar are supposed to be are missing several letters. If I try to go to system properties the menu is missing most of its letters.
Here is a screenshot:
I am posting this because it just happened on the 2nd system which is an 8th gen Intel Dell desktop with a fresh install of 22.04.4 and an AMD rx4200 video card. The other system that has this issue is a 7th gen Intel Dell laptop with integrated Intel video.
I don't know where to look for error messages. I don't see anything in dmesg
If I reboot the fonts are fine again.
I googled "troubleshoot fonts in gnome"
I tried fc-cache -s and then alt-f2 and restart, but the message I got was restart is not available on wayland. As I typed restart all the letters were blank.
If I go into display properties and change the scale from %200 to %100 and then revert the fonts are repaired. Now I can do alt-f2 and type a command with visible letters.
I don't know how to reproduce it.
I suspect it is a bug. If I can get some guidance I will provide all the info I can. This only happens maybe once a week.