Light offset on instanced stereo

[xrgo]

Hello! there's seems to be an offset to the left on lights when using instanced stereo
in the screenshots you can see a point light in the exact same position as the green cube:
mono:

stereo:


the problem is in screenspace, if I turn my head (the vr headset) upsidedown the offset is still at the left of the screen (but to my right)

Any idea what might cause this?
Saludos!