I have found the culprit! The Uranus material was somehow subsurface, like you suggested in the first place 
It didn’t show in the visualize screen somehow, so I didn’t notice it.
At the moment of the print you refer to, the subsurface material is changed to a non subsurface material an the light switches on. Then 12 seconds later, it is changed back and the lighting goes off again.
Does this mean that subsurface materials and the Oculus don’t go together, or is there something specific about my scene that causes this?