Easygeofecning does not work when the pointing latitude and longitude is updated

I am running the example from the pub.dev website (this one) for easygeofencing but when I update the pointing latitude and longitude and then start again, the service does not work and the console print "Parse value===> false" Any idea plzz? I am stuck at it since so many days (only when I reload the app it works)

class _MyHomePageState extends State<MyHomePagee> {
  TextEditingController latitudeController = new TextEditingController();
  TextEditingController longitudeController = new TextEditingController();
  TextEditingController radiusController = new TextEditingController();
  StreamSubscription<GeofenceStatus>? geofenceStatusStream;
  Geolocator geolocator = Geolocator();
  String geofenceStatus = '';
  bool isReady = false;
  Position? position;
  String latitude = "35.48833";
  String longitude = "-20.70939";
  String radius = "20";
  final Telephony telephony = Telephony.instance;

  @override
  void initState() {
    super.initState();
    getCurrentPosition();
  }

  final TextToSpeech  flutterTts = TextToSpeech();
  Future speak(String data) async{
    var result = await flutterTts.speak(data);
    if (result == 1){
      print("playing");
    }
  }

  void sendsms(String y){
    telephony.sendSms(to: '28557830',
        message: y);
  }

  getCurrentPosition() async {
    position = await Geolocator.getCurrentPosition(
        desiredAccuracy: LocationAccuracy.high);
    print("LOCATION => ${position!.toJson()}");
    isReady = (position != null) ? true : false;
  }

  setLocation() async {
    await getCurrentPosition();
    // print("POSITION => ${position!.toJson()}");
    latitudeController =
        TextEditingController(text: position!.latitude.toString());
    longitudeController =
        TextEditingController(text: position!.longitude.toString());
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title!),
        actions: [
          IconButton(
            icon: Icon(Icons.my_location),
            onPressed: () {
              if (isReady) {
                setState(() {
                  setLocation();
                });
              }
            },
          ),
        ],
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(10.0),
        child: Column(
          // mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            TextField(
              controller: latitudeController,
              decoration: InputDecoration(
                  border: InputBorder.none, hintText: 'Enter pointed latitude'),
            ),
            TextField(
              controller: longitudeController,
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter pointed longitude'),
            ),
            TextField(
              controller: radiusController,
              decoration: InputDecoration(
                  border: InputBorder.none, hintText: 'Enter radius in meter'),
            ),
            SizedBox(
              height: 60,
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                RaisedButton(
                  child: Text("Start"),
                  onPressed: () {
                    print("starting geoFencing Service");

                    EasyGeofencing.startGeofenceService(
                        pointedLatitude: latitudeController.text,
                        pointedLongitude: longitudeController.text,
                        radiusMeter: radiusController.text,
                        eventPeriodInSeconds: 5);
                    if (geofenceStatusStream == null) {
                      geofenceStatusStream = EasyGeofencing.getGeofenceStream()!
                          .listen((GeofenceStatus status) {
                            if(status.toString() == 'GeofenceStatus.exit'){
                              speak("You are exiting the safe area");
                             // sendsms("The user has surpassed the geographical boundary");
                            }

                        print(status.toString());
                        setState(() {
                          geofenceStatus = status.toString();
                        });
                      });
                    }
                  },
                ),
                SizedBox(
                  width: 10.0,
                ),
                RaisedButton(
                  child: Text("Stop"),
                  onPressed: () {
                    print("stop");
                    EasyGeofencing.stopGeofenceService();
                    geofenceStatusStream!.cancel();
                  },
                ),
              ],
            ),
            SizedBox(
              height: 100,
            ),
            Text(
              "Geofence Status: \n\n\n" + geofenceStatus,
              textAlign: TextAlign.center,
              style: TextStyle(fontSize: 20.0, fontWeight: FontWeight.bold),
            ),
          ],
        ),
      ),
    );
  }

  @override
  void dispose() {
    latitudeController.dispose();
    longitudeController.dispose();
    radiusController.dispose();
    super.dispose();
  }
}