Dropdown not in correct location when previewing/published

I currently have my dropdown list set at a fixed position - 95px from the top.

When I “open menu” in dropdown settings, it is in the correct location.

However when I preview or publish the site, the dropdown come from the top, not from 95px down.

The strange thing is that if I “open menu” and then preview (with it still open) it shows it 95px from the top.

Is this a bug, or am I doing something wrong?

Here is my link https://preview.webflow.com/preview/bigdropdown?utm_medium=preview_link&utm_source=designer&utm_content=bigdropdown&preview=b914fddfe787cc25a0256c7b10818d40&workflow=preview

Many thanks


Here is my site Read-Only: LINK
(how to share your site Read-Only link)