I’ve been seeing this as well (specifically previous frames being rendered if my framerate drops below my monitor refresh rate), although it’s only started occurring with the 545 driver, I’m able to run 535 without issue, and the current explicit sync patches don’t seem to solve it (although I understand they’re incomplete).
I’m experiencing the exact same issue as seen in your YouTube video. I have a 2560x1440 144Hz display and both in Plasma wayland 5.27.10 and Hyprland it shows those artifacts in games where I do not exactly hit 144 fps.
I even tried the nvidia beta 550 driver but it showed the same artifacts.
Fixes are on the way in XWayland, Nvidia drivers and Linux desktop as Wayland Explicit Sync is rolling out within the next weeks to all major projects involved in this.
I am using nvidia-open-dkms version 550.78, kernel 6.8.9, hyprland. Warframe is really bad with the sync issues: the flashing/syncing/glitching makes it pretty unbearable. In game is better than in menus but it is really bad.
My web browsers flicker and render weird now too, for at least the last few driver versions. That might be due to whatever Chrome/Brave is doing with their wayland/x11 flags.