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SUMMARY
Hello,

I am experiencing a strange behavior in Krita 5.2.11 on Windows.

The brush opacity sometimes changes on its own.

Layer blending modes (e.g. switching to "Saturation") change without me selecting them.

Panels and parts of the interface appear to move or update as if I were scrolling, even when I am not.

What makes this even more confusing is that I also notice similar issues in other programs on my system (for example, Glary Utilities and even Windows settings panels start scrolling down automatically).

What I have already tried:

Reinstalled Krita (latest version 5.2.11).

Updated Glary Utilities and Windows.

Disabled the touchpad, tested with Bluetooth mouse only.

Tested keyboard in Notepad → no stuck keys detected.

Reset Krita configuration and workspace.

Ran antivirus/malware scans → no threats found.

System details:

Windows [10/11, specify]

Laptop with integrated touchpad + Bluetooth mouse

Krita 5.2.11

I am not sure if this is a Krita bug, a driver/hardware issue, or something else. I wanted to report it in case other users have experienced the same problem.

Thank you in advance for your help.

STEPS TO REPRODUCE
1. 
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OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION