VR 6DoF

[s0i37]

Hello.
Is it by design that in immersive-vr I can not obtain position?

navigator.xr.requestSession('immersive-vr', {
  requiredFeatures: ['bounded-floor']
}).then(session => {
  xrSession = session;
  session.updateRenderState({ baseLayer: new XRWebGLLayer(session, gl) });

  session.requestReferenceSpace('local').then(refSpace => {
    xrRefSpace = refSpace;
    session.requestAnimationFrame(onXRFrame);
  });
});

function onXRFrame(time, frame) {
  const pose = frame.getViewerPose(xrRefSpace);
  pose.transform.position.x
  pose.transform.position.y
  pose.transform.position.z
}

In immersive-ar I can obtain orientation and position.