Unity 5.3.5p2 compiled executable (Oculus DK2) breaks (OVR detached from headset view) on second execution

I have an Oculus Unity game that works fine in play mode. When compiled to an executable, it runs perfectly the first time. But on second time execution, it breaks. We have a helmet via the CurvedUI asset to the OVR Player (i.e. what contains the CenterEyeAnchor) and have a custom player controller. The problem is the headset view detaches itself from the helmet and the playercontroller. We can still move the helmet using our controls. What could possibly be the explanation for this?