Created attachment 185887 [details]
An image showing two overlapping panels in edit mode with one Panel Settings dialogue open, showing the same widget in the upper right corner of both panels

SUMMARY


STEPS TO REPRODUCE
1. create overlapping panels in any corner of the screen, one horizontal, the other vertical
2. place a different widget in the corner of each
3. restart plasmashell

OBSERVED RESULT
the panel chosen to be on top seems to change randomly upon starting plasma shell

EXPECTED / DESIRED RESULT
there should be an option on the Panel Settings dialogue to set a "priority" or "layer" which would control which panel appears above and which panel appears below

SOFTWARE/OS VERSIONS

Operating System: CachyOS Linux 
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.3-1-cachyos-bore-lto (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 5 3400G with Radeon Vega Graphics
Memory: 16 GiB of RAM (13.6 GiB usable)
Graphics Processor: AMD Radeon RX 7600 XT

ADDITIONAL INFORMATION
The current solution is to put the same widget in the corner of both panels, with the panels sized in such a way that the icon appears in the same position.  This is not ideal because it makes duplicate widgets a necessity.