diff --git a/frontend/src/components/MapView/LeftPanel/utils.ts b/frontend/src/components/MapView/LeftPanel/utils.ts
index 6a550d62b..b1d817a38 100644
--- a/frontend/src/components/MapView/LeftPanel/utils.ts
+++ b/frontend/src/components/MapView/LeftPanel/utils.ts
@@ -50,7 +50,7 @@ function formatLayersCategories(
           layer.group = group;
         }
 
-        return layer;
+        return { ...layer, group };
       }
       return LayerDefinitions[key as LayerKey];
     }),