Lightroom freezes or flickers after a few minutes of use

I've installed Lightroom 7.2 on an up-to-date Win11 notebook with a 10th gen i7 CPU, 1+2 TB SSD, 32 GB RAM and an RTX 2060 GPU. All other video and photo editors, like Photoshop, for example, work fine. Lightroom, however, works no more then just a few minutes or actions and it freezes. In some cases, after a few minutes, I can see menu selection flickering when hovering the mouse over, but usually freeze seems to be permanent with max 0.x % CPU use, GPU use, disk use and few GB of RAM.

First trying to open the Healing pane caused freeze. I can, however, adjust image settings, but when I click the color picker in Point Color and move the picker over the image, and once I stop my mouse, LR goes freezed again.

This phenomenon is independent of whether GPU acceleration is enabled, and also independent of what refresh rate I set between 60 and 100 Hz for the display.  Image/file size doesn't matter, happens even with a 1MB file of 1600x1600 px. Windows and GPU drivers up-to-date. 

Tried to to extensive search but could not find a solution. Can you?

Cheers,

Gus