Hi,
Thanks, I understand now that you wrote, but I can not see any search box above your menu on your site. I can see ot only on the attached screenshot.
I can see only one search box on the sidebar of your site, that seems right. As I remember, I saw the same at the last time.
So I do not understand under what circumstances does the problem occur?
How do you add the searchbox to your site? Do you use a widget or a shortcode, and exactly where the widget or shortcode inserted in your site?
Peter