Created attachment 179549 [details]
Video of the screencast window being uninteractable with a filepicker in the background

SUMMARY
If multiple portal windows are open at a time, only one is interactable.

Which one is interactable depends on the type; with file picker windows the latest one is interactable, but with screencast windows and having a file picker open in the background, the filepicker window is prioritized

STEPS TO REPRODUCE
1. Open a desktop portal filepicker from any application (Firefox with widget.use-xdg-desktop-portal.file-picker=1)
2. Open a screencast window from any application (ASHPD Demo -> Screen Cast)
3. Observe not being able to interact with the screencast window (the filepicker window is prioritized)

OBSERVED RESULT
Only one window is interactable

EXPECTED RESULT
Every window should be interactable

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Graphics Platform: Wayland