Navbar not displaying on published site

Hi folks,
I may have been starting at this too long, but can anyone see why the navbar on my site is not displaying?

It is visible when I work on it and when I use the Toggle preview, but when I publish it, it disappears. It seems to be auto switching to Hide in the Navbar settings, which suggests I have some kind of conflict somewhere but I just can’t see it

Any help gratefully received. Many thanks

Link to shared site preview at the bottom

Screen shot of the settings for the nav bar instance

The nav container

And the div called hom_nav_menu

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

I fixed the issue by rebuilding the nav bar.