In current Arch Linux with xorg-server-xwayland 1.20.0 and 1.20.1 Chromium has some rendering issues in Wayland session.
After pressing F11 in chrome or playing full screen video artifacts appear. Leaving full screen not fix its, its fixing only after window closing.
Bug not shows when using system decoration option for chrome.
Video: Intel UHD 620
Display resolution: 3820x2160
Video driver: xf86-video-intel 1:2.99.917+831+ge7bfc906-1
I was built few versions of XWayland and found first faulty commit: https://cgit.freedesktop.org/xorg/xserver/commit/?id=8d0d89715984e321315631dd6667e05813d26e03
Screenshot with bug: https://ibb.co/gbLMCp (black and white squares)
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You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/xserver/issues/728.