This is most noticeable when typing in Konsole. Sometimes text won’t appear until a few seconds later, or upon moving the mouse, or after typing another letter. I can also see it on Zutty and some text boxes, such as the lockscreen password field.
I’m on Debian Sid, KDE plasma 6.2.5, wayland, kernel 6.12.8. The computer is a HP envy laptop with a AMD Radeon 760M Graphics card.
The problem doesn’t occur when I reduce the refresh rate to 48 Hz, but obviously that’s not a satisfactory solution. Having another window on screen can also fix the problem - at least if the other window is Firefox.
I sometimes see glitches with a band across the screen all messed up, but it’s rare and very brief, so it doesn’t really bother me, but maybe it’s related.
Ubuntu live doesn’t have the problem.