Ticket #40997: fix.2.patch

src/wp-admin/js/customize-nav-menus.js

@@ -2852 +2852 @@
                 var insertedMenuIdMapping = {}, insertedMenuItemIdMapping = {};
 
                 _( data.nav_menu_updates ).each(function( update ) {
-                        var oldCustomizeId, newCustomizeId, customizeId, oldSetting, newSetting, setting, settingValue, oldSection, newSection, wasSaved, widgetTemplate, navMenuCount;
+                        var oldCustomizeId, newCustomizeId, customizeId, oldSetting, newSetting, setting, settingValue, oldSection, newSection, wasSaved, widgetTemplate, navMenuCount, shouldExpandNewSection;
                         if ( 'inserted' === update.status ) {
                                 if ( ! update.previous_term_id ) {
                                         throw new Error( 'Expected previous_term_id' );
@@ -2884 +2884 @@
                                         previewer: api.previewer
                                 } );
 
-                                if ( oldSection.expanded() ) {
+                                shouldExpandNewSection = oldSection.expanded();
+                                if ( shouldExpandNewSection ) {
                                         oldSection.collapse();
                                 }
 
@@ -2959 +2960 @@
                                         }
                                 } );
 
-                                if ( oldSection.expanded.get() ) {
-                                        // @todo This doesn't seem to be working.
+                                if ( shouldExpandNewSection ) {
                                         newSection.expand();
                                 }
                         } else if ( 'updated' === update.status ) {