Oculus shutting down after repositioning it on my head

Hi, 
i am developing the game 'Elena' and I have the problem that every time try to test a Bugfix (we just released :smile:) the headset shuts down when I put my hands on the rift to adjust it for perfect vision.
A notification appears that the headset could not be found and Steam VR shuts down and the Unreal Engine shuts down too.

Could someone help me try fixing this? It seems the problem is the check whether the headset is used or not because the errors do not appear when I press my finger against the little sensor. 

Regards,
Kasimir