APNs Silent push notifications not working when app is kill state

Hi,

We are using APNs for push notifications.

When my app [iOS 12 or 13] in kill state & open any other apps [like WhatsApp or any] then silent push notifications are not reaching my app.

If my app is in kill state & didn't open any other apps then silent push notification is calling AppDelegate "didFinishLaunchingWithOptions" function.

Im using content-available for silent notifications as shown bellow.

{
   "aps" : {
      "content-available" : 1
   }
}

Please help me in fixing this issue. Thanks.