angular - ionic 2 Almacenamiento y datos de la base de datos se pierden una vez que se cierra la aplicación en Android

Estoy usando Ionic 2 SqlStorage para almacenar algunos datos, pero se pierden una vez que cierro la aplicación en dispositivos Android.

El siguiente código de ejemplo para almacenar datos.

import {Injectable} from '@angular/core';
import { Storage, SqlStorage } from 'ionic-angular';

@Injectable()
export class DatabaseService {
  private storage: Storage;

  constructor() {    
    this.storage = new Storage(SqlStorage);
    // we're creating a table called 'devicedata' if it doesn't exist
    this.storage.query('CREATE TABLE IF NOT EXISTS devicedata (id INTEGER PRIMARY KEY AUTOINCREMENT, institutionid TEXT, userimage TEXT, firstname TEXT, lastname TEXT, email TEXT, dob TEXT, gender TEXT, aadhaarno TEXT, nickname TEXT, mobile TEXT, geocode TEXT, location TEXT, ip TEXT, type TEXT, deviceid TEXT, os TEXT, app TEXT, capability TEXT)');
    this.storage.query('CREATE TABLE IF NOT EXISTS seqquestions (id INTEGER PRIMARY KEY AUTOINCREMENT, seqques TEXT, secseq TEXT, status TEXT)');
  }

  saveDeviceData(data) {
    let sql = 'INSERT INTO devicedata (institutionid, app, capability) VALUES (?, ?, ?)';
    // return the query which happens to be a promise.
    return this.storage.query(sql, [data.institutionid, data.app, data.capability]);
  }    

 // get all categories
  getDeviceDetails() {
    return this.storage.query('SELECT institutionid, userimage, firstname, lastname, email, dob, gender, aadhaarno, nickname, mobile, geocode, location, ip, type, deviceid, os, app, capability FROM devicedata');
  }
    updateProfileDetails(obj){
    console.log(JSON.stringify(obj));
      let sql = 'UPDATE devicedata SET nickname = ?, userimage = ?, firstname = ?, lastname = ?, email = ?, dob = ?, gender = ?, aadhaarno = ?';
      return this.storage.query(sql, [obj.nickname, obj.userimage, obj.firstname, obj.lastname, obj.email, obj.dob, obj.gender, obj.aadhaarno]);
    }    
}