If the products aren’t refreshed during filtering, it is most likely that FiboFilters has not recognized the product loop selector. The normal loop selector with products is ul.products. FiboFilters tries to guess other selectors based on templates, but in some cases, you must type the selector manually using WordPress filters.
To do it use the following snippet. Replace our sample selector .site-main div.sample-products with your custom selector.
add_filter( 'fibofilters/config/products_loop_selectors', function () {
return [ '.site-main div.sample-products' ];
} );
Read more about fixing the loop start selector.