Created attachment 169824 [details]
Floating panel arrangement (primary || secondary)

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SUMMARY
With multiple monitors, if the floating panel has a translucency margin that is visible at the transition between the two displays.

STEPS TO REPRODUCE
1. Set panel to Floating and Always Translucent
2. Move panel in between two monitors (eg primary || secondary)
3. Physically disconnect the primary display, such that the primary display must change
    - If using a laptop where the laptop is the primary display, close the lid.
    - NOTE: Simply switching display configuration will not work.
4. Reconnect the primary display
5. Move a window over the panel so it stops floating

OBSERVED RESULT
The translucency margin is visible

EXPECTED RESULT
The translucency margin should not be visible, like Opaque

SOFTWARE/OS VERSIONS
Operating System: KDE neon 6.0
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
Kernel Version: 6.5.0-35-generic (64-bit)
Graphics Platform: X11

ADDITIONAL INFORMATION