Quest3 - Head rotation problem in Unity play mode

Hi, when connecting Quest3 via airlink to Unity (play mode), head rotations along the Z axis are not tracked. The tracking works ok in unity on desktop, but in the headset, the there is no tilt. It seems the scene is always centered. Eg. a cube will not tilt when I tilt the head. Tracking the head sideways and up/down works. It seems there is a kind of billboard function that prevents tilt rotations. Any suggestions?