Не работает фильтр на шаблонах WordPress, а на статичной странице работает гладко, почему?

На обычных страницах с шаблонами не действует фильтр. Где я ошибся?

Страница врачей:

   `<form method="GET">
        <?php
        $stepens = get_terms([
            'taxonomy' => 'stepen',
            // 'exclude' => Array(1), Убираем без рубрики
        ]);
        $pols = get_terms([
            'taxonomy' => 'pol'
        ]);
        $kids = get_terms([
            'taxonomy' => 'kids'
        ]);

        ?>
        <?php foreach($stepens as $stepen) :?>
        <div class="parametr">
            <input type="checkbox" name="filter[stepen][]" value="<?php echo $stepen->term_id; ?>" id="stepen_<?php echo $stepen->term_id;?>">
            <label for="stepen_<?php echo $stepen->term_id;?>"><span><?php echo $stepen->name;?></span></label>
        </div>
        <!-- /.parametr -->
        <?php endforeach; ?>
        <?php foreach($kids as $kid) :?>
        <div class="parametr">
            <input type="checkbox" name="filter[kids][]" value="<?php echo $kid->term_id; ?>" id="kids_<?php echo $kid->term_id;?>">
            <label for="kids_<?php echo $kid->term_id;?>"><span><?php echo $kid->name;?></span></label>
        </div>
        <!-- /.parametr -->
        <?php endforeach; ?>
        <?php foreach($pols as $pol) :?>
        <div class="parametr">
            <input type="checkbox" name="filter[pol][]" value="<?php echo $pol->term_id; ?>" id="pol_<?php echo $pol->term_id;?>">
            <label for="pol_<?php echo $pol->term_id;?>"><span><?php echo $pol->name;?></span></label>
        </div>
        <!-- /.parametr -->
        <?php endforeach; ?>
        <button>Поиск</button>
    </form>`

php Код:

<?php 

        global $wp_query;

        $query = array(
            'post_type' => 'specialists',
            'tax_query' => array(
                'relation' => "AND",
            )
        );

        if (isset($_REQUEST['filter'])) {


            if (isset($_REQUEST['filter']['stepen']) && is_array($_REQUEST['filter']['stepen'])) {
                $stepens = array();
                foreach ($_REQUEST['filter']['stepen'] as $stepen) {
                    $stepens[] = intval($stepen);
                }

                $query['tax_query'][] = array(
                    'taxonomy' => 'stepen',
                    'field' => 'term_id',
                    'terms' => $stepens,
                );
                unset($stepens);
            }

            if (isset($_REQUEST['filter']['pol']) && is_array($_REQUEST['filter']['pol'])) {
                $pols = array();
                foreach ($_REQUEST['filter']['pol'] as $pol) {
                    $pols[] = intval($pol);
                }

                $query['tax_query'][] = array(
                    'taxonomy' => 'pol',
                    'field' => 'term_id',
                    'terms' => $pols,
                );
                unset($pols);
            }
            if (isset($_REQUEST['filter']['kids']) && is_array($_REQUEST['filter']['kids'])) {
                $kids = array();
                foreach ($_REQUEST['filter']['kids'] as $kid) {
                    $kids[] = intval($kid);
                }

                $query['tax_query'][] = array(
                    'taxonomy' => 'kids',
                    'field' => 'term_id',
                    'terms' => $kids,
                );
                unset($kids);
            }

            $query = array_merge($wp_query->query, $query);

            query_posts($query);
        }

        $query = new WP_Query( $query );
        if( $query->have_posts() ){
            while( $query->have_posts() ){
                $query->the_post();

                get_template_part( 'template-parts/content', 'content' );
            }
        }
        else {
            echo 'Записей нет';
        }

?>