Plaats onderstaande code in functions.php


/** close flyout on facetwp-loaded so that the user doesn't need to close after facet refreshes **/
add_action( 'wp_head', function() { ?>
    <script>
        (function($) {
            $(document).on('facetwp-loaded', function() {
              if (FWP.loaded && $('.facetwp-flyout').hasClass('active') ) {
                  FWP.flyout.close();
              }
          });
        })(jQuery);
    </script>
<?php } );