Same problem here, the problem happens only with moonlight, I can confirm it stops the head tracking exactly after 1min. I think I started do have this problem when I updated my oneplus 3t from android 8.0 to 9.0 so maybe it is related to android version. I already deactivated battery optimzation, fixed trinus on memory and nothing changes. Btw, is this software dead? It dont receives updates for a long time.