Hamburger Menu appears completely different in designer than on the actual page

Hey guys! I need your help.
The problem is, that my hamburger menu appears completely different in designer than on the actual page. So I can’t style the menu correctly. I made a video to show the issue. Any tipps to solve this problem?

https://www.loom.com/share/64d7d42107d048f592dfc812ee71437e


Here is my site Read-Only: https://preview.webflow.com/preview/aquadona?utm_medium=preview_link&utm_source=designer&utm_content=aquadona&preview=ea73f984465a370b70b6a5f6901fb492&workflow=preview