Thanks for your answer!
Currently the site is local hosted, is it possible to post a short video of the issue here?
I am using Gchrome and windows 10.
I solved the issue by using the other menu, but I would prefer to use the regular one 🙂
Also I forgot but this bug only occures when I am navigating on the website while not logged in as admin.
If I try this when I am in the theme parameters, all works perfectly fine.
Thanks in advance,
Louis