title: user location disappears, then reappears a minute later
body: <p>When reloading data to show on a MKMapView, the pin will disappear for a minute but then reappear, I have set the <code>self.mapView.showsUserLocation=YES;</code> in several places in my code and I also have this method to try and stop it from vanishing:</p>
  
  <pre><code>- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation {
      self.mapView.showsUserLocation=YES;
  }
  </code></pre>
  
  <p>What can cause the user location to disappear?</p>