Ticket #47436: 47436.2.patch

src/wp-includes/nav-menu-template.php

@@ -189 +189 @@
                 }
         }
 
-        // Add the menu-item-has-children class where applicable
-        if ( $menu_items_with_children ) {
+        // Add the menu-item-has-children class where applicable and depth of the menu is not set to 1.
+        if ( $menu_items_with_children && 1 != $args->depth ) {
                 foreach ( $sorted_menu_items as &$menu_item ) {
                         if ( isset( $menu_items_with_children[ $menu_item->ID ] ) ) {
                                 $menu_item->classes[] = 'menu-item-has-children';