Created attachment 164067 [details]
Contents of ~/.local/share/kscreen

SUMMARY
Display arrangement settings are sometimes lost after shutting down and starting a new session. Happens somewhat infrequently, maybe once a week (approximately 1 / 10 boots?). This issue has persisted for me across multiple clean OS reinstalls on the same hardware, first with OpenSUSE and now with Debian.

STEPS TO REPRODUCE
1. Configure the display arrangement, primary display setting, scaling etc. in System Settings -> Display and Monitor -> Display Configuration.

OBSERVED RESULT
The settings are sometimes lost (reverted to default) after a reboot and need to be configured again.

EXPECTED RESULT
The settings are permanently saved and reconfiguration is not needed, unless there is a hardware change or something that would render the saved settings unusable.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-13-amd64
Graphics Platform: Wayland
Distribution: Debian 12 Bookworm

HARDWARE
Monitor Lenovo T27h (Secondary, DisplayPort directly connected to GPU)
Monitor ASUS MX27AQ (Primary, DisplayPort connected to other monitor's DP output "daisy chained")
GPU AMD Radeon RX 6750 XT (recently upgraded from an RX 5700, no effect on this issue)

ADDITIONAL INFORMATION
Contents of ~/.local/share/kscreen included as attachment.