It seems the screen adjusts if you move with regards to the view of the screen becoming elongated. It also then becomes out of focus.
It is rather difficult to explain. The best would be to put on the old gear vr with an s7 and open the internet browser. As you move your head to type there is no issue between looking at the number pad and the text pad, the screen stays in focus and doesnt partially transform.
Now try the same thing with the s9+ and sm-325 gear vr and you will immediatly see what im referring to.