Ticket #48077: 48077.diff

src/js/_enqueues/wp/updates.js

@@ -2416 +2416 @@
                  */
                 $( window ).on( 'message', function( event ) {
                         var originalEvent  = event.originalEvent,
-                                expectedOrigin = document.location.protocol + '//' + document.location.hostname,
+                                expectedOrigin = document.location.protocol + '//' + document.location.host,
                                 message;
 
                         if ( originalEvent.origin !== expectedOrigin ) {