Issue with Native Background GeoLocation plugin

Hi,

I have an issue when using native IONIC Background Geo Location implementation. Using the Dragan template for asking my question:

What platform are you using? iOS or Android?
Android 6

What OS environment? Windows, Linux, MacOS?
Windows

Have you received an error or is it just not working?
I’m using Background GeoLocation NATIVE Wrapper plugin. When a new location update is received the returned BackgroundGeolocationResponse object does not contain a locationId property. Everything else works fine.

The relevant code snippet looks like:

this.backGeo.configure(this.config).subscribe((position: BackgroundGeolocationResponse) => {
      console.log("New position recevied: " + position);
      // Then I'm doing some stuff and afterwards I try to delete the location Entry from internal DB
      // But whatever I'm doing here, position.locationId is null, even so all other 
      // properties of the object are properly filled...
      this.backGeo.deleteLocation(position.locationId);
        

Cordova version if you have already wrapped your app?
Here my package.json

{
  "name": "MyTrack2",
  "author": "Ionic Framework",
  "homepage": "http://ionicframework.com/",
  "private": true,
  "scripts": {
    "clean": "ionic-app-scripts clean",
    "build": "ionic-app-scripts build",
    "ionic:build": "ionic-app-scripts build",
    "ionic:serve": "ionic-app-scripts serve"
  },
  "engines": {
    "node": "6.9.2"
  },
  "dependencies": {
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/compiler-cli": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/platform-server": "^4.0.0",
    "@ionic-native/background-geolocation": "^3.4.4",
    "@ionic-native/core": "4.0.1",
    "@ionic-native/diagnostic": "4.0.1",
    "@ionic-native/geolocation": "4.0.1",
    "@ionic-native/google-maps": "4.0.1",
    "@ionic-native/network": "4.0.1",
    "@ionic/storage": "2.0.1",
    "angularfire2": "^2.0.0-beta.8",
    "firebase": "^3.7.2",
    "ionic-angular": "3.5.3",
    "ionic-native": "^2.8.1",
    "ionicons": "3.0.0",
    "rxjs": "5.4.0",
    "sw-toolbox": "3.6.0",
    "zone.js": "0.8.12"
  },
  "devDependencies": {
    "@ionic/app-scripts": "2.0.2",
    "@ionic/cli-plugin-cordova": "1.5.0",
    "@ionic/cli-plugin-ionic-angular": "1.4.0",
    "ionic": "3.6.0",
    "typescript": "2.3.3"
  },
  "version": "0.0.1",
  "description": "An Ionic project"
}

Thanks for your help.

Thomas