Problem:
The customer reported that updating filter values triggers the fade effect, but the posts remain unchanged. This issue occurs on their articles and ebooks pages.
Solution:
To troubleshoot, we requested temporary admin login details and permission to create a staging version of the site for debugging. After initial investigations and involving our 2nd tier support, we created a new view for the Articles post type with an Ajax-enabled category filter. This view worked as expected without the customizations. We replicated this setup on the production site, creating an alternative view (Alt Articles) and recommended that the customer gradually apply their customizations to identify the step causing the issue.