@renewmyid your server / or used plugin is blocking access to the admin-ajax.php. You can see this in the browser console (F12 ). ( Failed to load resource: the server responded with a status of 403 (Forbidden) ).
Either check the settings for any security plugins, or custom code in the functions.php inside your active theme folder, or ask your host if they are blocking access.
@rhcare I can’t see the issue in my desktop browser when I make the screen smaller, so it’s very hard for me to debug ( I do see it on mobile ).
Any developers you worked with you could ask to look into this so they can play around with the CSS code on your server. It’s almost 99% sure a rule that runs a CSS media query that breaks the design.