Quick update from my side: I have not encountered the issue so far again. Neither with the old nor with the new version. Not sure why this is as it used to happen frequently. I would like to point out though that none of my screens is set to a different text scaling (everything is in standard settings). I will keep watching this and let you know if I encounter the issue again. Thanks!

I use the latest version of SC, and the drivers of my graphic adapter are up to date.

Other screenshot apps (just tried Snipping Tool) do not suffer from the same issue.

I changed the screen resolution as per your suggestion but this didn't improve the situation.

What else could be done?

Cheers,
Christian