Ionic 3 - getTags() return empty value or never execute

[oTTa]

I using Ionic 3 and I can add and delete tags and receive notifications but i can't get the tags because the value is empty or the function never execute, The code is the following:

app.component.ts //init app

import { OneSignal } from '@ionic-native/onesignal';

constructor(private oneSignal: OneSignal...........){
.//code
.//code
.
platform.ready().then(() => {
.//code
this.handlerNotifications();
.//code
}
.//code
.//more code
.//mode code
}
private  handlerNotifications() {
    this.oneSignal.startInit(Configuration.ONESIGNAL_ID, Configuration.FIREBASE_CONFIG.messagingSenderId);
    this.oneSignal.inFocusDisplaying(this.oneSignal.OSInFocusDisplayOption.InAppAlert);
    this.oneSignal.handleNotificationReceived().subscribe(() => {
       // do something when notification is received
    });
    this.oneSignal.handleNotificationOpened()
    .subscribe(jsonData => {
      let alert = this.alertCtrl.create({
        title: jsonData.notification.payload.title,
        subTitle: jsonData.notification.payload.body,
        buttons: ['OK']
      });
      alert.present();
      console.log('notificationOpenedCallback: ' + JSON.stringify(jsonData));
    });
    this.oneSignal.endInit();
    this.oneSignal.sendTag('email',this.user.email); //testing code
    this.oneSignal.sendTag('notificaciones','1'); //testing code
  }

configuracion.ts //here use getTags()

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { OneSignal } from '@ionic-native/onesignal';
import { SeccionService } from '../../services/seccion.service';
import { ToastService } from '../../services/toast.service';
import { Seccion } from '../../models/seccion';
import { Platform } from 'ionic-angular';
@IonicPage()
@Component({
  selector: 'page-configuracion',
  templateUrl: 'configuracion.html',
})
export class ConfiguracionPage {
  public secciones: Array<Seccion>;

  constructor(public navCtrl: NavController, public navParams: NavParams, private oneSignal: OneSignal,
              public seccionService: SeccionService, public toast: ToastService, private platform: Platform) {
   this.obtener_secciones_principales();
  }

  private obtener_secciones_principales() {
    this.seccionService.get_principales().subscribe(
      (data) => {
        this.secciones=data;
        if(this.platform.is('cordova')) {
        this.oneSignal.getTags()
             .then((tags) => {console.log("TAGS: ",JSON.stringify(tags));})
             .catch((error) => {
               console.log("TAGSerror: ",JSON.stringify(error))
             });
        }
      },
      (error) => { this.toast.error('Error al cargar las secciones'); }
    );
  }

}

OneSignal dashboard show me

Android Device Motitor

[Nightsd01]

@oTTa We have not implemented promises with the Cordova SDK. Have you tried using the callback instead of a promise chain?

this.oneSignal.getTags((tags) => {
   // use the tags result
});

[oTTa]

@Nightsd01, The method was working was the Android Device Monitor that did not show the result. If I showed the tags in a layout I could see them, thanks anyway.