WP_Query orderby date not working

This will definitely work….It worked for me…

    $username = get_the_author_meta( 'login', $author_id );
    $args = array(
            'post_type' => 'any',
            'orderby' => 'date',
            'order'   => 'DESC',
            'suppress_filters' => true,
            'tax_query' => array(
             array(
                   'taxonomy' => 'author',
                   'field' => 'name',
                   'terms' => $username
                  )
             )
        );

$query = new WP_Query( $args );