tags. This adds a filter prior to saving the post via * REST API to disable markdown support. Disables markdown support provided by * plugins Jetpack, JP-Markdown, and WP Editor.MD * * @since 1.3.0 * * @param array $post Post object which contains content to check for block. * @return array $post Post object. */ function gutenberg_remove_wpcom_markdown_support( $post ) { if ( class_exists( 'WPCom_Markdown' ) && has_blocks( $post['post_content'] ) ) { WPCom_Markdown::get_instance()->unload_markdown_for_posts(); } return $post; } add_filter( 'wp_insert_post_data', 'gutenberg_remove_wpcom_markdown_support', 9 );