Infinite Scroll Suddenly Stopped Working

Hi All,

On a site I’m working on, infinite scroll has suddenly stopped working for category pages, for example https://clubfoody.com/category/beef/ (It was working fine a few days ago) However, it works fine without any problems for search results, for example: https://clubfoody.com/?s=beef

Infinite scroll is built-in to the theme, which we are not able to update, and we do not use Jetpack. Can anyone help me out with this issue? Thanks.

The page I need help with: [log in to see the link]