Bug 507354

SUMMARY
The default lock screen image is displayed instead of the one defined in the system settings at least when actively locking the screen with [Meta]+[L].

STEPS TO REPRODUCE
1. Set a custom lock screen image via system settings -> screen locking -> Configure Appearance... -> Image ...
2. Observe that this image is correctly displayed after booting
3. Press [Meta]+[L]

OBSERVED RESULT
The default lock screen image is displayed. (In Fedora 42, KDE Plasma 6.4.3, it is a light red background with blue plastic-looking hooks laid out next to each other)

EXPECTED RESULT
The defined lock screen image is displayed.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.3
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
Kernel Version: 6.15.6-200.fc42.x86_64 (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION
1. I set the priority to "normal" instead of "minor" because it effectively makes the whole lock screen appearance setting moot. Feel free to change it if you disagree about the severity.

2. When setting the wallpaper type to "Slideshow" and the "Change every" setting to e.g. "30 seconds", then, after 30 seconds of displaying the default image, it will begin to show the defined custom wallpaper.

3. Not sure if I selected the right component here.