Hi Dima,
Sorry for the delay. Correct, WooCommerce Follow-ups is one of their premium plugins. WooCommerce does NOT provide any support to third party plugins, so they won’t be any help here.
I could see about setting up a demo site with the three plugins included (WooCommerce, WooCommerce Follow-ups, and Advanced Ajax Product Filters) and providing you with admin access, so you can login and take a look if you’re interested. This would allow you to see what’s happening and make sure there is no conflict in the future.
If not, I understand and would try a different plugin.
Thanks @3sonsdevelopment for looking into the problem. I was able to get it solved the other day. It was related to a custom action in the theme that was enabling ajax on single pages. I got it worked out with the theme devs to create an action to filter out certain products.
I’ll mark as resolved. 🙂
