Hi Dom,
that’s a common Problem.
The Problem is that once your mouse leaves the Trigger Element the Dropdown closes.
You need to make sure that there is no space between the Dropdown List and the Dropdown Trigger.
If you still want a space you can use padding on the dropdown list instead of margin.
Working Example below:
https://preview.webflow.com/preview/doms-problem?utm_medium=preview_link&utm_source=designer&utm_content=doms-problem&preview=67c28ab5186daf23ff513320adb99212&workflow=preview