messaging/internal-error only IOS

code is working fine when I try to send notification on android but it does not work for IOS notification. Getting the below error:

{
  "results": [
    {
      "error": {
        "code": "messaging/internal-error",
        "message": "An internal error has occurred. Please retry the request."
      }
    }
  ],
  "canonicalRegistrationTokenCount": 0,
  "failureCount": 1,
  "successCount": 0,
  "multicastId": 8118740071861272000
}

This is my code sample

return await admin.messaging()
          .sendToDevice(deviceToken, {
   data: {
       title: 'Test Fcm',
       body: 'tesing fmc body',
       content_available: 'true',
       priority: 'high',
       requestId: '1',
       doctorId: '1',
       name: 'waqas',
       patientId: '1',
       action_type: 'TEST'
     },
     notification: {
       title: 'Test Fcm',
       body: 'tesing fmc body',
       content_available: 'true',
       priority: 'high'
     }
   }
  , {
   priority: "high",
   timeToLive: 60 * 60 * 24,
   contentAvailable:true,
}).catch(err => {
              console.log(err);
            
          })

[tomershohet]

Found the issue - They recently changed it on FCM so they do not allow to sent TEXT and BODY keys. From now on - we should only use the “Body”. Once I removed the “Text” key from the notification object - everything works fine again.

[isonlaxman]

This is still not reliably working for me. I have ‘body’ instead of ‘text’, and I don’t have ‘content-available’ in the payloads. It only randomly fails, works 80-90% time.