Firebase FCM notification received in iOS simulator but as GCM(?) on real iOS device in flutter app

_x000D_ _x000D_ edit: it is supposed to look like it does on the device log, according to Firebase support I am adding push notifications via FCM to my Flutter app, but the message format is very different on the iOS Simulator vs. my iPhone 5s. When receiving a push notification from the Firebase console to an active/opened app. Problem: What do I need to do to make sure the real device receives the message in the correct format? Log from Simulator (iPhone XR, 12.2) (looks like in the official code examples): onMessage: { from: 123000000000, collapse_key: com.mydomainnamehere, notification: { body: Lorem ipsum, title: Title, e: 1, tag: campaign_collapse_key_9876543210011223344 } } Log from real device (iPhone 5s, 12.2) (can't find any references online to this): onMessage: { google.c.a.c_l: notif_name, google.c.a.e: 1, aps: { alert: { title: Title, body: Lorem ipsum } }, gcm.n.e: 1, google.c.a.c_id: 9876543210011223344, google.c.a.udt: 0, gcm.message_id: 1234567800998877, google.c.a.ts: 1234567800 } The notification is sent from the Firebase console to all devices, the logs are taken from the same notification (but I anonymized the id's). The Device and Simulator is running the same Flutter code from Android Studio, at the same time. Parts of my pubspec.yaml that refers to FCM firebase_core: ^0.4.0+1 firebase_auth: 0.11.1 cloud_firestore: ^0.11.0+2 firestore_ui: ^1.4.0 firebase_messaging: ^5.0.2 Software and SDK Versions Flutter Channel dev, v1.8.4, Mac OS X 10.14.5, Android SDK version 28.0.3, Xcode 10.2.1, Android Studio version 3.4 Flutter message-handling code void initState() { super.initState(); if (Platform.isIOS) { iosSubscription = _fcm.onIosSettingsRegistered.listen((IosNotificationSettings settings) { print("FCM settings received: $settings"); }); _fcm.requestNotificationPermissions(IosNotificationSettings()); } _fcm.configure( onMessage: (Map message) async { print("onMessage: $message"); }, ); getFcmToken(); } void getFcmToken() async { var token = await FirebaseMessaging().getToken(); print("Token $token"); } I was expecting that the JSON format would be the same on both the simulator and a real device. But the real device isn't even receiving all of the notification.