Wordpress Website - Mobile Sites not loading correctly

Hi, I've recently cloned my site, everything is working perfectly on the desktop view, but there seems to be an issue with certain functions and items loaded on mobile devices (both tablet and phone). I run a fully optimising, responsive theme, so everything usually works well. Chrome developer seems to indicate a mixed content issue, however i do have the simple SSL plugin installed and set up correctly, which handles this issue. Hopefully a quick fix for an experienced wordpress developer