Created attachment 157726 [details]
short video of the effect

SUMMARY
When i want to capture a selected area on my second screen, the overlay seems to zoom-in a bit. That does not happen on my primary screen. It also happens when the capture-area is triggered via hot-key, without going through the GUI. Its notable that my second screen has a lower resolution than the primary one.

This seems only to affect the gray overlay, the content that is actually captured seems to be taken from the normal resolution (so: i get more than what i have actually selected). 

STEPS TO REPRODUCE
1. Use multi-display setup, have second screen with a lower resolution than primary
2. toggle area capture

OBSERVED RESULT
The selection overlay seems zoomed-in of the actual screen

EXPECTED RESULT
The overlay should have the same size

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 6.1.19-1-MANJARO
(available in About System)
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION
Operating System: Manjaro Linux
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.19-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 1800X Eight-Core Processor
Memory: 47,0 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1080/PCIe/SSE2