Ticket #31239: 31239.patch

src/wp-includes/js/mce-view.js

@@ -560 +560 @@
                         frame.state('gallery-edit').on( 'update', function( selection ) {
                                 var shortcode = gallery.shortcode( selection ).string(), force;
                                 $( node ).attr( 'data-wpview-text', window.encodeURIComponent( shortcode ) );
-                                force = ( data !== shortcode );
-                                wp.mce.views.refreshView( self, shortcode, force );
+                                wp.mce.views.refreshView( self, shortcode, true );
                         });
 
                         frame.on( 'close', function() {