edit

src/Menu.php

@@ -174,7 +174,7 @@ class Menu
 
                 if (!isset($menu[$k]['child'])) {
                     if (isset($this->group[$menu[$k]['group_id']])) {
-                        unset($this->group[$menu[$k]['group_id']]);
+                        //unset($this->group[$menu[$k]['group_id']]);
                     }
                     unset($menu[$k]);
                 }