Hi,
I started this thread a while back : https://www.8theme.com/topic/bug-regarding-the-mobile-menu-when-trying-to-close-it-visible-in-demos-too/#post-325460
The problem identified and it was supposed to be added into a fix in a new update
However, even though i can see it in the changelog for the newer theme version the problem still exists. I think it was fixed specifically on the product page only but using a different z-index value to avoid conflicts when you are on the product page. However the problem still exists with various other elements. For a quick test go on a shop page for example and open the menu. Then try to close the menu by clicking outside of it but if a product happens to be there it will register the click.
Can you please check it out ?
Thank you