FacetWP - isotope / image show issue for The7 theme

test.php

<?php

// Goes into functions.php
function fwp_theme_fix() {
?>
<script>
(function($) {
    $(document).on('facetwp-loaded', function() {
        $('.iso-grid').addClass('cont-id-0').isotope();
        $('.wf-cell').addClass('shown');
    });
})(jQuery);
</script>
<?php
}

add_action( 'wp_head', 'fwp_theme_fix', 99 );