title: unity vuforia extended tracked problems
body: <p>i need help. I use unity2018.2.12f1&amp;Vuforia 7.5.26. My task - dont hide object, after image doesnt in FOV. I made track device pose, positional mode, optimize for images and deleted code OnTrackingLost(). It works incorect. When status is NOT_FOUND camera does not see the model but model did not dissappaer. You can watch that in video <a href="https://youtu.be/FHGHULr8J90" rel="nofollow noreferrer">https://youtu.be/FHGHULr8J90</a></p>
  
  <pre><code> public void OnTrackableStateChanged(
      TrackableBehaviour.Status previousStatus,
      TrackableBehaviour.Status newStatus)
  {
      m_PreviousStatus = previousStatus;
      m_NewStatus = newStatus;
  
      if (newStatus == TrackableBehaviour.Status.DETECTED ||
          newStatus == TrackableBehaviour.Status.TRACKED ||
          newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
      {
          Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
          OnTrackingFound();
      }
      //else if (previousStatus == TrackableBehaviour.Status.TRACKED &amp;&amp;
      //         newStatus == TrackableBehaviour.Status.NO_POSE)
      //{
      //    Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " lost");
      //    OnTrackingLost();
      //}
      //else
      //{
      //    // For combo of previousStatus=UNKNOWN + newStatus=UNKNOWN|NOT_FOUND
      //    // Vuforia is starting, but tracking has not been lost or found yet
      //    // Call OnTrackingLost() to hide the augmentations
      //    OnTrackingLost();
      //}
  }
  </code></pre>