RenderTexture camera transform affected by VR

Hi,

I'm running in VR mode on 5.4.0b17. I have a secondary camera in my scene that I want to render out to a texture (implementing portal type effect), therefore I set the TargetTexture variable.

I would assume that this secondary camera would not have its transform updated by the Oculus but it is. Is this expected behaviour? Is there any way as of yet to explicitly tell a camera not to have its transform updated from VR headset?

Thanks!