Why is my select field formatted weird on windows OS

I have a “select field” field in a form that has a dropdown of the US states and it looks fine in safari and chrome on Mac, as well as both on mobile iPhone’s but the dropdown looks like a big white block on windows devices I think.

I would give you advise on how to recreate it, but I can only see it when I use my friends windows laptops. So for windows users, can you see what I could change in the designer to fix this?

Here is my read only link: Webflow - Nimbus