Created attachment 155696 [details]
Flickering of task manager entry indicating loss and gain of focus

SUMMARY
I started noticing that sometimes panel won't get focused and most notably with Task Manager. In the attached video, it is very clear that there are regions on the panels that don't activate the focus of the panel items.

Note:
1. In the video, I am using Floating Panel because it is very easy to spot the issue. But this also happens when I am not using Floating Panel. 
2. It also happens with system tray items but not easily reproducible.


STEPS TO REPRODUCE
1. Use Floating Panel with Expanded Task Manager
2. Open a window
3. Minimize it
4. Move the mouse pointer in the padding between the edge of screen and floating panel.

OBSERVED RESULT
There is a flickering of task manager item demonstrating loss and gain of focus 

EXPECTED RESULT
Focus should stay consistent as I am hovering over the task manager entry

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.26.90
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.1.8-arch1-1 (64-bit)
Graphics Platform: Wayland