Cell still vibrates even set vabrate property = null in ionic local notification plugin

I want my application to show a progress bar when I start a download or upload. For that I’m using fileTransfer, ionic local notifications.The value of progress is given according to the change of a variable that receives the value of an observable. o update the notification I used the update method, but with each update it vibrates again.
NOTE: When the cell phone has volume it does not vibrate.
Follow code

import { ChangeDetectorRef, Component,  } from '@angular/core';
import { ApiService } from '../api.service';
import { LocalNotifications } from '@ionic-native/local-notifications/ngx';
import { Platform } from '@ionic/angular';
@Component({
  selector: 'app-home',
  templateUrl: 'home.page.html',
  styleUrls: ['home.page.scss'],
})
export class HomePage {
  cont = 0
  aux = 0

  constructor(
    private apiService: ApiService, 
    private notificacao: LocalNotifications, 
    private platForm : Platform,
    private changeDetectorRef : ChangeDetectorRef,
  ) {
    this.apiService.getContObservable().subscribe(res => {
      console.log('Novo Valor: ', res)
      if (res == 1) {
        this.cont = res / 100
        this.aux = res
        this.criarNoficacao()

      } else if (res == 100) {
        this.cont = 0
        this.aux = 0
      } else {
        this.cont = res / 100
        this.aux = res
        this.notificacao.update({
          id: 1,
          sound: null,
          vibrate : null,
          progressBar: { value: this.aux }
        });
      
      }
    })

  }
  
  enviar(){
    this.apiService.incrementar()
  }

  criarNoficacao(){
    let song;
    if (this.platForm.is("android")) {
      song = 'file://sound.mp3'
    } else if (this.platForm.is('ios')) {
      song = 'file://beep.caf';
    } else {
      song = null
    }
    this.notificacao.schedule({
      id: 1,
      title: 'Sync in progress',
      text: 'Copied 2 of 10 files',
      progressBar: { value: this.aux }
    });
  }

 /*  enviar(){
    this.apiService.inserirDados(this.entrada) //do request
  }

  listar(){
    this.apiService.listar();
  }
  limpar(){
    this.apiService.limpar();
  } */
  
}

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