[MU4 Issue] Flickering issue when using global menu (Linux, KDE Plasma)

[DmitryArefiev]

Screenshots

Platform information
Linux KDE Plasma

Additional context
Related to #15826 changes

[njvdberg]

FWIW, I see something similar is e.g. kdevelop5. So I'm not sure this is a MuseScore specific issue.

[adazem009]

Please check if this is resolved in #18593

[DmitryArefiev]

@adazem009 The initial screenshots was not taken from my machine (from Discord chat).
Now I've installed KDE Plasma and can reproduce very similar effect in 4.2 master when clicking File menu:

VID_20231117_141856_0_COMPRESSED.mp4

And it looks normal (fixed) in #18593

[adazem009]

@adazem009 The initial screenshots was not taken from my machine (from Discord chat).
Now I've installed KDE Plasma and can reproduce very similar effect in 4.2 master when clicking File menu:

VID_20231117_141856_0_COMPRESSED.mp4

And it looks normal (fixed) in #18593

Do you also experience crashes after closing MuseScore? That issue is related to the global menu bar too.

Edit: nevermind, you've mentioned that in the pull request...