Why do my facets disappear?
The most common causes for disappearing facets are:
Issues with the “facetwp-template” class
Most often, facets disappear because facet shortcodes are placed inside the facetwp-template container element, or they end up there after filtering. The content of the HTML element with that class is dynamically replaced when using facets, so facets always need to be outside of it to keep functioning properly.
In listings made with the Listing Builder, this issue will never happen, because the class will be automatically placed on the right element.
But if you are using a WP Archive or a custom WP_Query, or a setup with a page builder query/posts block for your listing, your facets may end up inside the element that has the facetwp-template class after filtering, because in some situations the class is dynamically moved to a higher level parent element that also contains the facets.
The solution in all cases is removing the facetwp-template class from where you placed it (if you did), and manually placing it on an element that (directly) surrounds the post loop.
For further explanations about the role of the facetwp-template class in FacetWP’s automatic query detection, and ways to fix issues with it, see the sections about it on the Using a WP Archive and Using a custom WP_Query pages.
Elementor Element Caching
Disappearing facets can also happen if you are using Elementor, with the Element Caching feature enabled. Element Caching is incompatible with FacetWP.
If you see a “FacetWP was unable to auto-detect the post listing” error, or if your facets are not showing (or disappearing after use), make sure to disable Element Caching globally or in every FacetWP-related widget.