userChanges stream in Flutter Fire does not stream profile changes

According to FlutterFire docs, userChanges should stream any changes to user profile in Firebase. I added the following code to a screen:

class UserInfo extends StatefulWidget {
  UserInfo({Key key}) : super(key: key);

  @override
  _UserInfoState createState() => _UserInfoState();
}

class _UserInfoState extends State<UserInfo> {
  FirebaseUser _user;
  StreamSubscriber _userChnages;

  @override
  void initState() { 
    super.initState();
    _userChanges = FirebaseAuth.instance.userChanges().listen((user) {
      setState(() {
        _user = user;
      })
    })
  }


  @override
  Widget build(BuildContext context) {
    return Container(
       child: Text(_user?.email ?? "No user"),
    );
  }
}

When I make changes outside the app (for example new user verifies email address or I change their displayName in backend) the stream never fetches those changes and the callback of .listen() is never run.