Fixter Theme Navigation flips between bulleted list and horiztonal menu

Hi Support

When I load this website: the navigation initially loads as a bulleted list and flips to the horizontal navigation style I set. I don't know if this is something taht is being worked on (ie. it's a currently know issue) or if there is something I need to do in Upfront in the CSS editor to stop this from happening.

Can you give me some information on how to fix this?

Support access has been granted for this site if you need to take a closer look. I'll also upload a couple screenshots so you can see what I'm seeing.