Sticky Post

Hi,

It is default behaviour of wp_query. You can use the below code to display sticky post on top on archive page –

function prefix_sticky_first_order( $clauses, $query ) {
    if ( !is_admin() && $query->is_main_query() && is_category() ) {

        $sticky_posts = get_option('sticky_posts');

        if ( !empty($sticky_posts) ) {
            global $wpdb;

            $sticky_ids = implode(',', array_map('intval', $sticky_posts));

            $clauses['orderby'] = "
                FIELD({$wpdb->posts}.ID, $sticky_ids) DESC,
                {$wpdb->posts}.post_date DESC
            ";
        }
    }

    return $clauses;
}
add_filter( 'posts_clauses', 'prefix_sticky_first_order', 10, 2 );

Glad to hear that it works.