Событие не запускается до 3-го клика

Question

У меня есть фильтр по алфавиту на веб-сайте WordPress, который я хотел бы отфильтровать, когда буква выбрана без необходимости выбирать букву, а затем кнопку поиска. Однако, кажется, что он работает только после 3-го щелчка, и это при быстром нажатии. Сам фильтр является настройкой для существующей темы каталога WordPress, вот ссылка на каталог: https://staging.pata.org.uk/item/. Как я могу получить щелчок, чтобы вызвать первый щелчок буквы, а не третий? Это jquery:

    <script type="text/javascript">
            jQuery(document).ready(function(){
                // filter type actions

                // checkbox
                jQuery('.advanced-filters-wrap-letter ul li.filter-checkbox-letter').on('click', function(e){
                    jQuery(this).toggleClass('filter-enabled');
                    var $input = jQuery(this).find('input');
                    if($input.is(':checked')){
                        $input.removeAttr('checked');
                    } else {
                        $input.attr('checked', true);

                    }


                // filter submit actions
                jQuery('.filter-container').on('click', function(e){
                    e.preventDefault();
                    // build new query
                    var addToFilter = "";
                    var filterString = "";
                    var filterCheck = 0;
                    // &filters=id;id;id
                       jQuery('.advanced-filters-wrap ul li').each(function(){
                        var $inputOne = jQuery(this).find('input');
                        if($inputOne.is(':checked')){
                            addToFilter = $inputOne.val() + " ";
                            filterCheck += 1;
                        }
                    });

                    jQuery('.advanced-filters-wrap-letter ul li').each(function(){
                        var $input = jQuery(this).find('input');
                        if($input.is(':checked')){
                            filterString = filterString + $input.val() + " " + addToFilter;
                            filterCheck += 1;
                        }
                    });
                    filterString = filterString.trim().replace(new RegExp(' ', 'g'), ";");

                    var pathName = window.location.pathname;
                    /* remove page parameter from url */
                    pathName = pathName.replace(new RegExp("page\/[0-9]*\/", 'g'), "");
                    /* remove page parameter from url */

                    var baseUrl = window.location.protocol+"//"+window.location.host+pathName;
                    var eParams = window.location.search.replace("?", "").split('&');
                    var nParams = {};
                    jQuery.each(eParams, function(index, value){
                        var val = value.split("=");
                        if(typeof val[1] == "undefined"){
                            nParams[val[0]] = "";
                        } else {
                            nParams[val[0]] = decodeURIComponent(val[1]);
                        }
                    });
                    var query = jQuery.extend({}, nParams, { filters: filterString });
                    if(filterCheck == 0){
                        delete query.filters;
                    }
                    delete query.paged;
                    delete query.count;

                    // remove empty keys
                    jQuery.each(query, function(k, v){
                        if(!k){
                            delete query[k];
                        }
                    });

                    var queryString = jQuery.param(query);
                    window.location.href = baseUrl + "?" + queryString;
                });
            });
                    });

            </script>

, а это остальная часть кода

<?php
// &filters=id;id;id;id
$themeOptions = aitOptions()->getOptionsByType('theme');
$advancedFiltersOptions = (object)$themeOptions['itemAdvancedFilters'];

if($advancedFiltersOptions->enabled){
    $filters_avalaible = get_terms('ait-items_filters', array('hide_empty' => false));
    $filters_enabled = array();
    if(isset($_REQUEST['filters']) && !empty($_REQUEST['filters'])){
        $filters_enabled = explode(";",$_REQUEST['filters']);
    }

    if($query->max_num_pages != 1){
        // check if there will be pagination
        $item_query_args = $query->query_vars;  // populate new variable ... dont modify original query
        $item_query_args['nopaging'] = true;
        $item_query = new WP_Query($item_query_args);
    } else {
        $item_query = $query;
    }

    $item_filters = array();
    foreach($item_query->posts as $post){
        $post_meta = get_post_meta( $post->ID, '_ait-item_filters-options');
        if(!empty($post_meta)){
            $post_filters = $post_meta[0]['filters'];
            foreach ($post_filters as $id) {
                $filter = get_term($id, 'ait-items_filters', "OBJECT");
                if(!empty($filter)){
                    array_push($item_filters, $filter);
                }
            }
        }
    }
    $unique_filters = array_map("unserialize", array_unique(array_map("serialize", $item_filters)));
    $filters_avalaible = $unique_filters;

    usort($filters_avalaible, function($a, $b){
        return strcmp($a->slug, $b->slug);
    });

    ?>
    <?php
        if(is_array($filters_avalaible) && count($filters_avalaible) > 0){

    ?>
        <div class="advanced-filters-wrap-letter">
            <div class="advanced-filters-container">
                <div class="content">

 <h3>Alphabetical</h3>
                            <ul class="advanced-filters columns-<?php echo $advancedFiltersOptions->filterColumns ?>">
                                <?php
                                $array=array("A", "B", "C", "D", "E", "F","G","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
                                $letters = array(); 

          foreach($filters_avalaible as $filter){  

                                if(in_array($filter->name,$array)) {

                                       array_push($letters, $filter);
                                  }

                                }  
                                    ?>


                                      <?php
                                      foreach($letters as $letter)
                                      {
                                        if(!empty($letter))
                                        {
                                        $filter_options = get_option( "ait-items_filters_category_".$letter->term_id );
                                        $filter_type = isset($filter_options['type']) ? $filter_options['type'] : 'checkbox';
                                        $is_enabled = in_array($letter->term_id, $filters_enabled);
                                        $li_class = "";
                                        $in_checked = "";
                                        if($is_enabled){
                                            $li_class = "filter-enabled";
                                            $in_checked = "checked";
                                        }

                                        switch($filter_type){
                                            case 'checkbox':
                                                /*$imageClass = !empty($filter_options['icon']) ? 'has-image' : '';*/
                                                $imageClass = 'has-image';
                                                $image = !empty($filter_options['icon']) ? '<i class="fa '.$filter_options['icon'].'"></i>' : '<i class="fa fa-dot-circle-o"></i>';
                                                echo '<li class="filter-container filter-checkbox-letter '.$li_class.' '.$imageClass.' "><input type="checkbox" name="'.$letter->slug.'" value="'.$letter->term_id.'" '.$in_checked.'> <span class="filter-name">'.$letter->name.'</span></li>';
                                            break;
                                            default:
                                                echo '<li class="filter-container filter-unsupported">'.__('Unsupported filter', 'ait-advanced-filters').'</li>';
                                            break;
                                        }  
                                    }}}?> 


                            </ul>

                </div>
            </div>
            <div class="advanced-filters-actions">
                <a href="#" class="filter-action-filterme-letter ait-sc-button"><?php _e('Search', 'ait') ?></a>
              <a href="/item/" class="clear-filter-alphabet ait-sc-button">Back</a>
            </div>


        </div>
<?php
        }