I really don't know what caused the following error whether it was a new update or my new monitor.
I use two benq monitors, one with the resolution 4k, the other one with HD. Basically, when I use the HD monitor everything is fine.
When I use the 4k monitor and I hover above the menue points, the menue point I hover above begins to tremble. Also the curser turns sometimes grey and there are things happening I really don't understand like randomly zooming in pictures in and out.
I reinstalled Lightroom, but the problems remain. I checked my graphics card and the latest driver is installed. I've never seen anything like this and I'm bit confused how to solve this problem.
Thanks for your help!
The first thing that you should try is to switch off the GPU support from the Lightroom preferences and check if that helps to fix the issue.
Go to Lightroom > Preferences > Performance tab > Uncheck "Use Graphics Processor" > Restart Lightroom.
If Lightroom doesn't start correctly the please see "Solution 2" in the document behind the second link.
Another step is to try to reset the Lightroom preferences.
If this doesn't help we need more informations about your environment.
Which operating system do you use?
Which version of Lightroom do you use?
Please post the exact version and not only phrases as "recent", "latest" and so on.
What is your operating system and software versions?
This sounds like a possible GPU. I suggest turning it off and then troubleshooting via these links.
The GPU was the matter. I re-installed the graphics driver and now it works just fine.
Thank you guys for your help!