@balloni55 I was able to replicate your issue on 1920x1080 screen when I set up browser zoom to 130%
Is it perhaps same in your browser? Have you tried changing browser zoom?
exactly, my monitor basic setting is at 125% because otherwise the elements are displayed too small for my eyes ;-))
If I change the browser zoom (mouse pointer over hamburger button +STRG > scroll mouse wheel) the slider is displayed sometimes longer sometimes shorter.
Alternatively I can display a longer and working slider after switching to fullscreen mode with the button.
Thanks for your help, maybe there is a way to basically fix the displayed length of the slider