ISTWCMS-5880: trying to fix null elements so that titles show correctly

src/Service/UwNodeData.php

@@ -180,7 +180,7 @@ class UwNodeData {
 
             // If the element is empty, unset it.
             if ($data == NULL && empty($data)) {
-              unset($node_data[$index]);
+              unset($node_data[$index][$sub_index]);
             }
           }
         }