Hi,
Thanks for the reply, I take it from the answer that there is no context in which Clone will work. OK, let me explain what our use case is.
We give our users the ability to swap between the 2D and 3D maps (MapView and SceneView). Clone is used to duplicate the layers in each view as they often can't be shared.
We were trying to do the same with the ENC layers.
I have noticed in 3D view that not all the features show, so maybe showing this in 3D is not such a good idea anyway.
Regards