Problem with ajax loading opencart?

Question

opencart

The problem as a whole is of such a plan. I installed the feofan.net/ajax-podgruzka-tovarov-pri-skrolle-kata module ...
On the desktop, everything works fine, it loads 15 products at a time. On the mobile, the script does not work at all. Either it works until you move away or you bring it closer on the mobile phone. The first 15 products are displayed and that's it. Tell me what could be the problem?
The site where the problem is observed is a120.ru/index.php?route=product/category&path=65_68