ISTWCMS-5711: additional specificity for menu sub-1

src/patterns/04-components/menu/menu--horizontal/_menu--horizontal.scss

@@ -595,7 +595,7 @@ $menu-horizontal-drop-bg: #f7f7f7;
   }
 }
 @-moz-document url-prefix() {
-  .sub-1{
-    display: inline-grid;
+  .uw-horizontal-nav--menu .menu .submenu-active .menu__subnav .menu__item.sub-1{
+    display: inline-grid !important;
   }
 }