It’ll depend on the Mobile Menu Collapse value you have set at Appearance > Theme Settings. If you send a link to the site, I can confirm. There is a Private Reply checkbox below the comment field if you want to keep the URL private.
Thanks. I think you have the menu collapse set to the perfect value. The user might be seeing the mobile menu because they’re using a low-resolution display. You could try changing the collapse point to say 900 and then check to see if the user is happy with the result.