Ajax request

Hello Support team.
I have a problem. Plugin doesn’t filter correct product visibility after ajax request.
For unregistered users, it should show about 30 products, but after an ajax request, all products are shown.
After a few scrolls, you can try to open some product, your plugin generates a 404 page because they are not visible for not logged in users

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