[Oculus] Camera with display (None) does not render to monitor when VR mode is disabled with VR enabled camera in scene

2. How we can reproduce it using the example you attached
1) Setup CV1 and Oculus
2) Builed and run
3) Take, or leave headset off (leave censor uncovered)
4) Observe that app window on the monitor renders black

Expected:

App window on main monitor renders a red circle and a sky box

Notes:
- This is a regression
- In the scene there are 2 cameras. One renders to Non (main display), the other renders to both eyes. They are set on the same depth.

Couldn't repro here:
5.4.4p1
5.5.0f3
5.5.1f1
5.5.1p2

Repro'd on:
5.6.0a2
5.6.0b7