I have query:

$tax_query = array(
    'relation' => 'AND');
    $tax_query[] = array(
        'taxonomy' => 'kategoria',
        'field'    => 'id',
        'terms'    => $term->term_id,
    );
    if($_GET['kolor']) {
        $tax_query[] = array('taxonomy' => 'kolor', 'field'    => 'slug', 'terms'    => $_GET['kolor']);
    }
$query = new WP_Query( array( 'post_type' => 'produkt', 'posts_per_page' => 1000, 'tax_query' => $tax_query, ) );

And this works great, but I want to add sorting by custom field, so I edit query to the next one:

$query = new WP_Query( array( 'post_type' => 'produkt', 'posts_per_page' => 1000, 'tax_query' => $tax_query, 'meta_key' => 'kolejnosc', 'orderby' => 'meta_value_num', 'order' => 'ASC' ) );

And this isn’t working, result is just one item, when there’s a lot more.