[Cardboard][Android] Per eye camera not working

Having 2 separate cameras in Unity (2017.3.0p4) set with pair eye camera left & right simply renders one eye with no stereo rendering using the Cardboard SDK via Unity XR interface.

The exact same code works perfectly fine with iOS. I have tried searching online and I’m wondering if there is any obvious reason why this sort of set up won’t work?

Reported this (case 997887)