title: Receiving multiple Duplicate Push notifications from Firebase
body: <p>I am facing a serious issue, I am receiving multiple push notifications from the server? Even the server is sending once. </p>
  
  <p>I read on stackoverflow different posts that its due to calling </p>
  
  <blockquote>
    <p>application.registerForRemoteNotifications()</p>
  </blockquote>
  
  <p>I checked and debugged the app, this method is calling only once in the AppDelegate.</p>
  
  <p>Any suggestion will be helpful for me?</p>