Unity 2017.2, Cardboard and Zeiss VR One Plus

I have deployed a demo app to my iPhone 7 Plus and then used the setting button to scan the QR Code of my Zeiss VR One Plus for which I get a successful pairing message.

The screen looks like it is not using very much screen real estate but kind of looks OK, until I view in the VR headset.

If I use both eyes I am seeing double vision, but if I close one eye I see the proper VR 360 experience.

I enabled VR under Unity XR settings and selected Cardboard, there are no other settings and no other settings when using the app on the device.

If I use other VR apps the experience is working as expected.

Any ideas?

See link to screen grab from iPhone.

https://ibb.co/eHkUEG

But just running on Samsung Galaxy S6 I get the correct result!

https://ibb.co/kTjJZR

This used to be the case on iOS so does anyone know does Cardboard no longer work on iOS?

 

Although even when in landscape it is still wrong!

iOS stereo image incorrect due to wrong phone orientation before starting VR mode #838

 

Looks like the fix is here: https://unity3d.com/unity/qa/patch-releases see Patch 2017.2.1p3