GTK4 popovers inhibit gnome-shell OSDs in Xorg
GNOME/Mutter 3.38.3, Xorg
It looks like all GTK4 popovers (e.g. the hamburger menu from gtk4-demo) are now inhibiting the GNOME Shell OSDs (volume, brightness etc.) from appearing on the screen, essentially making several also important actions from being carried out while they are shown.