(macOS) "Ghost content" with non-native fullscreen

[qwerasd205]

Running on macOS Sequoia, with the following config:

background-opacity = 0
macos-non-native-fullscreen = visible-menu
fullscreen = true
window-save-state = always

If I have some information displayed on screen, switch to another space, come back, then clear my screen I get some ghost display from the previous data. I need to exit full screen mode to remove the ghost writing or switch space again. It happens in every split. See attached

Originally posted by @kTag in #5674

Note

Looking closely it seems the compositor is applying some sort of drop shadow effect to the contents with non-native-fullscreen set like that, and it's only updating when switching spaces.

Idk off the top of my head what the correct solution is here - probably some way to signal to the compositor that the contents have changed in a way that the shadow needs to be recomputed - but it's well scoped enough to be turned in to an issue at this point.