Fix https://forum.babylonjs.com/t/warnings-in-version-4-1-using-instantiatehierarchy/9177/7

src/Meshes/instancedMesh.ts

@@ -406,7 +406,14 @@ export class InstancedMesh extends AbstractMesh {
         var result = this._sourceMesh.createInstance(name);
 
         // Deep copy
-        DeepCopier.DeepCopy(this, result, ["name", "subMeshes", "uniqueId", "parent"], []);
+        DeepCopier.DeepCopy(this, result, [
+            "name", "subMeshes", "uniqueId", "parent", "lightSources", 
+            "receiveShadows", "material", "visibility", "skeleton",
+            "sourceMesh", "isAnInstance", "facetNb", "isFacetDataEnabled",
+            "isBlocked", "useBones", "hasInstances", "collider", "edgesRenderer",
+            "forward", "up", "right", "absolutePosition", "absoluteScaling", "absoluteRotationQuaternion",
+            "isWorldMatrixFrozen", "nonUniformScaling", "behaviors", "worldMatrixFromCache"            
+        ], []);
 
         // Bounding info
         this.refreshBoundingInfo();