InstancedMesh parent clone bug fix

src/Meshes/instancedMesh.ts

@@ -391,7 +391,7 @@ export class InstancedMesh extends AbstractMesh {
         var result = this._sourceMesh.createInstance(name);
 
         // Deep copy
-        DeepCopier.DeepCopy(this, result, ["name", "subMeshes", "uniqueId"], []);
+        DeepCopier.DeepCopy(this, result, ["name", "subMeshes", "uniqueId", "parent"], []);
 
         // Bounding info
         this.refreshBoundingInfo();