Geofence is working only once and not all the time. Also it is not accurate. Notification pops up any time after entering the fence


My problem is that geofence is only working once in phone when I run ionic cordova run android–device.
I do not get any notification when i enter or leave the same place second time.

What can be the issue?
My code for geofence is as below. Do i need to add something in order to repeat the notification?

import { Component } from ‘@angular/core’;
import { AlertController, NavController, Events, MenuController, Platform} from ‘ionic-angular’;
import { locationsPage } from ‘…/locations/locations’;
import { LoginPage } from '…/login/login’
import { settingsPage } from ‘…/settings/settings’;
import { Geolocation } from ‘@ionic-native/geolocation’;
import { Geofence } from ‘@ionic-native/geofence’;

selector: ‘page-home’,
templateUrl: ‘home.html’
export class HomePage {

constructor(public navCtrl: NavController, private events: Events, private menu: MenuController, private geolocation: Geolocation, private geofence: Geofence, public alertCtrl: AlertController,private platform: Platform) {, ‘menu1’);

this.platform.ready().then(() => {

		// resolved promise does not return a value
		() => this.showAlert('geofence.initialize'),//console.log('Geofence Plugin Ready'),
		(err) => this.showAlert(err)//console.log(err)

this.geolocation.getCurrentPosition({enableHighAccuracy:true}).then((resp) => {
	// resp.coords.latitude
	// resp.coords.longitude
			//console.log('Geofence Plugin Ready');
			let fence = {
				id: '61432ec1-b7b1-4c48-90dd-4b91fb30b340', //any unique ID
				latitude: resp.coords.latitude, //center of geofence radius 
				longitude: resp.coords.longitude ,
				radius: 100, //radius to edge of geofence in meters
				transitionType: 3, //see 'Transition Types' below
				notification: { //notification settings
					id:             1, //any unique ID
					title:          'YOU ARE APPROACHING abc', //notification title
					text:           'Welcome.', //notification body
					openAppOnClick: true //open app when notification is tapped
				() => this.showAlert('geofence.addOrUpdate'),
				(err) => this.showAlert('Geofence failed to add: ' + err) //console.log('Geofence failed to add')

			this.geofence.onTransitionReceived().subscribe(resp => {

				this.showAlert('geofence.onTransitionReceived: ' + resp);

			this.showAlert(resp.coords.latitude + ' - ' + resp.coords.longitude);
}).catch((error) => {
	this.showAlert('Error getting location: ' + error.message);//console.log('Error getting location', error);


showAlert(msg: string) {
let alert = this.alertCtrl.create({
title: msg,
subTitle: msg,
buttons: [‘OK’]

Try to use the GeoFire library with the Firebase database, the search function receives a location (Latitude, Longitude) as the center of the search and the search radius in kilometers, the library works with observables, which trigger events when a location enters or leaves within the radius of the search