Hi Andrei, thanks for the video, that helped me understand.

So there is some logic in the cplane mechanism where if the cplane has its horizontal and vertical axes aligned with any of the Top/Front/Right world planes, it keeps the ortho views in their regular world orientations.

I don't really remember why I set it up that way, probably I was worried about having the world Top view showing in the Front or Right viewport... But I agree it is probably better not to have that kind of exception in there, so I will modify it to work like you were expecting for MoI v4.

- Michael