SUMMARY
Plasmashell repeatedly crashes under Wayland when playing media in Chromium (Flatpak) on Nobara Linux (Fedora-based, Plasma 6, Qt6). After several crashes, plasmashell fails to restart.

STEPS TO REPRODUCE

- Start KDE Plasma 6 session with Wayland on Nobara Linux (Fedora-based).
- Launch Chromium (Flatpak, latest version).
- Play a YouTube video or other media content.

OBSERVED RESULT
Plasmashell crashes and restarts several times, then fails to start.
Relevant log entries:

Logs:
"plasmashell[3821]: segfault at 10 ip 00007f137f4a0382 sp 00007ffc4bd5ec00 error 4 in libQt6QuickTemplates2.so.6.9.2systemd-coredump[6538]: Process 3821 (plasmashell) of user 1000 terminated abnormally with signal 11/SEGV, processing...systemd[3489]: plasma-plasmashell.service: Main process exited, code=dumped, status=11/SEGVsystemd[3489]: plasma-plasmashell.service: Failed with result 'core-dump'.qrc:/qt/qml/plasma/applet/org/kde/plasma/mediacontroller/main.qml:70:28: QML CompactRepresentation (parent or ancestor of Image): Cannot open: file:///tmp/.org.chromium.Chromium.TdtQ9naudit[7097]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=flatpak pid=7097 comm="chrome" exe="/app/chromium/chrome" sig=11 res=1audit[7181]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=flatpak pid=7181 comm="chrome" exe="/app/chromium/chrome" sig=11 res=1audit[7195]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=flatpak pid=7195 comm="chrome" exe="/app/chromium/chrome" sig=11 res=1"

EXPECTED RESULT
Plasmashell remains stable and does not crash when playing media in Chromium (Flatpak) under Wayland.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Nobara Linux (Fedora-based)
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Chromium: Flatpak (latest from Flathub)
Wayland session

ADDITIONAL INFORMATION

- The issue does not occur under X11.
- Disabling hardware acceleration in Chromium reduces crash frequency but does not fully resolve the issue.
- All packages and Flatpak runtimes are up to date.