#44306), the embed will fail to get the height set since the host page missed the height message from the post embed window. * Author: Weston Ruter */ namespace Slow_Post_Embeds; const QUERY_VAR = 'slow_redirect_url'; add_filter( 'script_loader_src', static function ( $url, $handle ) { if ( 'wp-embed' === $handle ) { $url = add_query_arg( [ QUERY_VAR => rawurlencode( $url ), 'cache_bust' => wp_rand(), ], home_url( '/' ) ); } return $url; }, 10, 2 ); add_action( 'template_redirect', static function () { if ( ! isset( $_GET[ QUERY_VAR ] ) ) { return; } $url = wp_validate_redirect( wp_unslash( $_GET[ QUERY_VAR ] ) ); if ( ! $url ) { return; } sleep( 3 ); wp_redirect( $url, 302 ); exit; } );