'Getting duplicate beacon values [Flutter 'beacons_plugin']

We are trying to get beacon values respect to the location point. I have a scan_cubit.dart where I manage the scanning things. I am triggering cubit's startScanning() and endScanning() methods from UI layer. There is scanTime property which is providing from package, inside beacon data. What the problem is that: when I look the values, there are same values twice or thrice. I put the

DateTime _now = DateTime.now();
            print(
                "Plugin receives: $data\nOn time ${_now.hour}:${_now.minute}:${_now.second}.${_now.millisecond}");

lines and saw the milliseconds of duplicate datas are different. I think I've done things correctly according to the package's example. Also if I put _initPlatformState() and await BeaconsPlugin.startMonitoring() again in startScanning() as stated in example, there is an extreme delay occurs(10-12 secs.) before starting measuring. That's why I didn't put them.

scan_cubit.dart

class ScanCubit extends Cubit<ScanState> {
  bool isRunning = false;

  .......
     some more code unrelated to beacons
  .......


  ScanCubit({required this.bluetoothStatusCubit}) : super(NotScanning()) {
    _monitorBluetoothStatus();
    _initPlatformState();

  }

  void startScanning(int indoorLevel, double lat, double long) async {
    currentPoint = PointModel(lat: lat, long: long, indoorLevel: indoorLevel);

    //_initPlatformState();
    //await BeaconsPlugin.startMonitoring();
    
    isRunning = true;
  }

  void endScanning() async {
    isRunning = false;
    //await BeaconsPlugin.stopMonitoring();
    _emitEndScanning();

    //mini delay to show circle progress
    await Future.delayed(const Duration(milliseconds: 300));
    _emitNotScanning();
  }

  Future<void> _initPlatformState() async {
    if (Platform.isAndroid) {
      //Prominent disclosure
      await BeaconsPlugin.setDisclosureDialogMessage(
          title: "Background Locations",
          message:
              "[This app] collects location data to enable [feature], [feature], & [feature] even when the app is closed or not in use");

      //Only in case, you want the dialog to be shown again. By Default, dialog will never be shown if permissions are granted.
      //await BeaconsPlugin.clearDisclosureDialogShowFlag(false);
    }

    if (Platform.isAndroid) {
      BeaconsPlugin.channel.setMethodCallHandler((call) async {
        print("Method: ${call.method}");
        if (call.method == 'scannerReady') {
          await BeaconsPlugin.startMonitoring();

          //isRunning = true;
        }
      });
    } else if (Platform.isIOS) {
      await BeaconsPlugin.startMonitoring();

      //isRunning = true;
    }

    BeaconsPlugin.listenToBeacons(beaconEventsController);

    await BeaconsPlugin.addRegion(
        "BeaconType1", "909c3cf9-fc5c-4841-b695-380958a51a5a");
    await BeaconsPlugin.addRegion(
        "BeaconType2", "6a84c716-0f2a-1ce9-f210-6a63bd873dd9");

    BeaconsPlugin.addBeaconLayoutForAndroid(
        "m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25");
    BeaconsPlugin.addBeaconLayoutForAndroid(
        "m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24");

    BeaconsPlugin.setForegroundScanPeriodForAndroid(
        foregroundScanPeriod: 1100, foregroundBetweenScanPeriod: 0);

    BeaconsPlugin.setBackgroundScanPeriodForAndroid(
        backgroundScanPeriod: 1100, backgroundBetweenScanPeriod: 0);

    beaconEventsController.stream.listen(
        (data) {
          if (isRunning && data.isNotEmpty) {
            
            DateTime _now = DateTime.now();
            print(
                "Plugin receives: $data\nOn time ${_now.hour}:${_now.minute}:${_now.second}.${_now.millisecond}\n");
            _emitScanningNow(currentPoint, data);
          }
        },
        onDone: () {},
        onError: (error) {
          print("Error: $error");
        });

    await BeaconsPlugin.runInBackground(true);
  }

And here is the debug console (look carefully scanTime and On time lines):

I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.2",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:18 PM",
I/flutter (32085):   "rssi": "-46",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:18.281
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.2",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:18 PM",
I/flutter (32085):   "rssi": "-46",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:18.285
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
E/        (32085): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]
E/        (32085): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1F:BE",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.22",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:19 PM",
I/flutter (32085):   "rssi": "-64",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:19.378
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1F:BE",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.22",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:19 PM",
I/flutter (32085):   "rssi": "-64",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:19.386
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1F:BE",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.22",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:19 PM",
I/flutter (32085):   "rssi": "-64",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:19.388
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
E/        (32085): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.21",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:20 PM",
I/flutter (32085):   "rssi": "-49",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:20.476
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.21",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:20 PM",
I/flutter (32085):   "rssi": "-49",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:20.481
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.21",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:20 PM",
I/flutter (32085):   "rssi": "-49",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:20.485
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.21",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:21 PM",
I/flutter (32085):   "rssi": "-46",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:21.592
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.21",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:21 PM",
I/flutter (32085):   "rssi": "-46",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
I/flutter (32085): On time 12:52:21.594
I/flutter (32085): Change { currentState: Instance of 'ScanningNow', nextState: Instance of 'ScanningNow' }
I/flutter (32085): Plugin receives: {
I/flutter (32085):   "name": "null",
I/flutter (32085):   "uuid": "4152554e-f99b-4a3b-86d0-947070693a78",
I/flutter (32085):   "macAddress": "B0:91:22:4B:1A:6A",
I/flutter (32085):   "major": "0",
I/flutter (32085):   "minor": "0",
I/flutter (32085):   "distance": "0.21",
I/flutter (32085):   "proximity": "Immediate",
I/flutter (32085):   "scanTime": "18 March 2022 12:52:21 PM",
I/flutter (32085):   "rssi": "-46",
I/flutter (32085):   "txPower": "-60"
I/flutter (32085): }
flutteribeaconbeacon


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