Created attachment 185235 [details]
Output of journal and related directories

SUMMARY
On Debian Stable with KDE Plasma, one of the screens (randomly HDMI-0 or DP-1) sometimes shows a black background and does not accept mouse interaction on the desktop (cannot click anything. Icons, context menu, nothing appears but a black background). Panels and application windows continue to work normally on that monitor.

If I open System Settings → Display and deactivate the affected monitor, Apply, then Undo (reactivate it), the desktop background, icons, context menu and everything appears, gets clickable and get back to normal.

STEPS TO REPRODUCE
1. Start KDE Plasma with two monitors (HDMI-0 and DP-1).
2. Occasionally, one monitor shows only black where the desktop should be, and it is not interactive. There's no icons, no context menu window.
3. Panel and windows still render fine.

OBSERVED RESULT

* Affected screen is black.

* Desktop containment is missing, cannot click or interact.

* Journald shows errors like:
```bash
org.kde.plasma.containmentlayoutmanager: Error: cannot change the containment to AppletsLayout
file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:XX: TypeError: Cannot read property 'configuration' of null
```

EXPECTED RESULT

Both screens should consistently show the desktop and allow interaction without manual deactivation/reactivation.

SOFTWARE/OS VERSIONSLinux/KDE Plasma: 
Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-37-amd64 (64-bit)
Graphics Platform: offscreen
Processors: 6 × Intel® Core™ i5-9400F CPU @ 2.90GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GT 1030/PCIe/SSE2


ADDITIONAL INFORMATION
Session Type: X11
Output of `journalctl --user -xe | grep plasmashell)` and related directories are on "output-screen-crash.txt" attachment.
Workaround: Disable and re-enable the monitor in Display Settings