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2 months agoI had something that might or might not be similar:
Also artifacts looking like yours, and also with Wayland; but:
Only on Firefox and I’m not sure if after sleep or in my case was after using fullscreen only.
They went away after the last mesa update, is yours the last version too?
In defence of the µ, I actually use it more than the other two, for micro- units.
The ¤ is the symbol for any currency but I have never seen it used in the wild.