Sticky menu with dropdown not playing it's part…

Hi People,
I’m hoping there is someone that is willing to guide me in the right direction. I have a sticky menu with a dropdown menu that is behaving differently in the designer and preview (see attachments).

Your help is much appreciated!

Here is my site Read-Only: (https://preview.webflow.com/preview/wcdp?utm_medium=preview_link&utm_source=designer&utm_content=wcdp&preview=45f5d5d8eece08e141ea886521079003&pageId=634399b7941d593ba425a5bc&workflow=preview)


Cheers,
Dennis