Hi again
The problem may be solved now.
I connected a second display and now I can'r reproduce the problem anymore.
In my PC I have a Intel CPU with a intergrated iGPU and a separate graphics card to boost performance.
When only the graphics card is connected to a display there is a problem but when the graphics card and the Intel iGPU
both is connected to a display the problem can not be reproduced.
I got the idea to test this from a note in the support forum regarding performance using iGPU together with a graphics card.
/Regards
Leif Jansson