Unity 5.6 - No update images on a Standard Camera

Hi

I'm trying to achieve something that used to work flawlessly on Unity 5.4 and that doesn't work on Unity 5.6 anymore.

I'm disabling the mirroring from the Oculus camera and activating a standard camera with target eye: None (Main Display) hoping to see the player playing with Oculus + TOuch from a different angle and displaying it on the monitor.

However while this worked well in Unity 5.4 now on Unity 5.6 the camera just shows a static image of the scene. It's like it doesn't update what happening in front of it. Infact if i disable the camera and enable it again i can see how the static image changes to the last things that has been changed.

What am i missing here? I want to be able to play in VR having a non-stereoscopic camera that display on the monitor.

Thanks 

PS: I'm using Unity 5.6 b5