title: Receive OneSignal background notification in Ionic 2 app
body: <p>I am using OneSignal push notifications in my Ionic 2 app. It works fine except for the following case:</p>
  
  <ul>
  <li>Kill the app to make sure it is not running in the background.</li>
  <li>Send a notification to the app.</li>
  <li>Dismiss the notification.</li>
  <li>Open the app.</li>
  <li>I don't receive any indication that the notification was received.</li>
  </ul>
  
  <p>I have called OneSignal.handleNotificationReceived().subscribe(), during initialisation, but this is not triggered unless the app is running in the foreground/background.</p>
  
  <p>Is there any way to get the notification when the app is started, even if the user dismissed the notification.</p>
  
  <p>Thanks.</p>