SUMMARY
Apologies, I'm not an expert in graphics/compositing/drawing, so please let me know if I can provide any other info.

Using Plasma 6 (which I understand is wayland), stutters and redraws previous frames. For example, in Guake, when typing, characters will appear, but sometimes the most recent character would disappear (reverting back to a state before the keypress?). Or when backspacing, the characters will disappear, but occasionally reappear. I tried to capture a video (with my cell phone - I didn't trust screen capture to "see" compositing glitches). The HTML rendering in Google Chrome was also glitchy. Reddit had elements flickering/disappearing/reappearing. I also captured stuttering on a YouTube video.

I've have example videos of YouTube and typing stuttering in Google Chrome, but issues affect much more than just Chrome: my Jetbrains IDEs, Guake, etc, etc.

YouTube video stuttering: https://photos.app.goo.gl/RmJwtWZDdp4uvAyH9
Typing stuttering: https://photos.app.goo.gl/XDtJ2LGgZKEer61J8


STEPS TO REPRODUCE
1. Use Plasma 6? No specific steps. Stuttering seems to be happening across multiple applications.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux kernel 6.7.9
KDE Plasma Version: 6.0.1
KDE Frameworks Version: libplasma 6.0.1-1 and plasma-framework5 5.115.0-3
Qt Version: qt5-base 5.15.12+kde+r151-1 and qt6-base 6.6.2-4

ADDITIONAL INFORMATION