当我更新帖子时，它的内容会被清除。下面的代码有什么问题？

add_action( \'save_post\', \'eb_save_subpage_data\' );
function eb_save_subpage_data() {
    global $post;

    if ( $post->post_type == \'subpage\' ) {
        update_post_meta( $post->ID, \'title_pl\', esc_attr( $_POST[\'meta_input_title_lang_pl\'] ) );
        update_post_meta( $post->ID, \'title_en\', esc_attr( $_POST[\'meta_input_title_lang_en\'] ) );
        update_post_meta( $post->ID, \'title_ru\', esc_attr( $_POST[\'meta_input_title_lang_ru\'] ) );

        remove_action( \'save_post\', \'eb_save_subpage_data\' );
        wp_update_post( array(
            \'ID\' => $post->ID, 
            \'post_title\' => esc_attr( $_POST[\'meta_input_title_lang_pl\'] ),
            \'post_name\' => sanitize_title( $post->post_title )
        ) );
        add_action( \'save_post\', \'eb_save_subpage_data\' );
    }
}