weird problem with wayland + mutter where exactly 2 overlays and nowhere else seem to think i am hovering about 50-100 pixels vertically above my mouse, but only while i am inside that overlay's bounds:

- firefox click-and-hold on the back button
- steam overlay in-game with shift+tab

the firefox one stops happening when i launch it with MOZ_ENABLE_WAYLAND=0

the steam overlay one i haven't managed to fix

internet searches seem to blame fractional scaling or multiple monitors but it still happens even when i disable all my monitors except 1 and also i always use 100% scaling (and attempting GDK_SCALE=1 doesn't fix it either)