When using the X11 GTK app workrave under a Plasma Wayland session, if I bring up its context menu by right clicking it (both the systray icon and the timer window will do) the context menu will remain up if I switch to and interact with a native Wayland app's window, and will only disappear if I either select an item from the context menu or I click in the window of another X11 app. NOTE: to get workrave to run under Wayland the environmental variable GDK_BACKEND must be set to "x11", or workrave will immediately crash.
I can reproduce with inkscape gtk2 on neon unstable. 1. on Wayland, open any app (Xwayland or Wayland, no matter) and inkscape 2. in inkscape, right-click on the area used to draw things 3. switch to another app by pressing alt+tab Result: context menu of inkscape remains open. Probably it's a Xwayland bug because I can also reproduce on Wayland session of Gnome. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.23.80 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.3 Graphics Platform: Wayland
Can confirm on Plasma 5.25.2 Wayland on openSUSE TW.