In the video linked at the bottom you can see the bug that I encounter. Basically, it happens for many context windows, like the setting panel for a YouTube video (As shown in my bug preview), when I use the fingerprint reader, when I open Bluetooth modal, etc.
It is always this flashing backdrop. I did not always have that problem, it is relatively recent. I think it started a few months ago.
Does anyone have an idea how I can resolve this issue? It is very annoying, and makes the phone barely usable for me. Unfortunately I did not find anyone else encountering this issue after some research.
I thought this is the best place to ask for advice. I am running the latest version in the stable channel of GrapheneOS.
Bug preview (video): https://streamable.com/63nws8