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.