Grab Pass - Single Pass Stereo Instanced - Correct usage?

Does anyone know the correct way to sample grabpass for single pass stereo instanced and non-instanced?

I’ve been testing a lot of variations of shaders but can’t get it quite right. This is the closest I’ve managed, but it’s a little bit off on the right eye.

Does anyone have any working examples?

I am also interested in this, just pulled your repository will check it out on Oculus Quest.

Well just as i was building the scene for testing i found that there is an open issue for grab passes…