Created attachment 176440 [details]
Screen recording of cursor growing when moving between screens

SUMMARY
The Mouse cursor grows in size when quickly when moving between screens in a KWin Wayland session.
After some time the cursor size will fix itself.

OBSERVED RESULT
Setup as follows:

Have two screens, same resolution and scaling.
Turn off corner and edge barrier in the active corners systemsettings because they are annoying you.
Set global scaling in systemsettings to 200%.
When slowly moving the cursor between both screens, the cursor will stay the same size.
Then quickly move the mouse cursor back and forth between both screens and it will grow.

EXPECTED RESULT
Cursor always stays the same size.

SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux 12
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.8.0
Qt Version: 6.7.2
Kernel Version: 6.12.3-amd64 (64-bit)
Graphics Platform: Wayland
Processors: 48 × AMD Ryzen Threadripper 7960X 24-Cores
Memory: 125.3 GiB of RAM
Graphics Processor: AMD Radeon RX 7900 XTX
Product Name: TRX50 WS

ADDITIONAL INFORMATION
See attached screen recording for a demonstration.

Brought to you by Wayland, Every Frame is Perfect(TM) (exceptions may apply for mouse cursor).