Hi Rene,
Thanks for reaching out to us!
We took a look at the site that's on your account, and it seems to be working well for us on sub pages.
Clicking the button from, for example, the Kontakt page, it redirects us to the correct page.
Can you perhaps send us a link to a specific sub page where this issue occurs?
Could you also let us know which browser you are using to test this?
Thanks!