Datas loaded in platform.ready() don't show up on the UI

I’m loading some datas with a cordova plugin :

platform.ready().then( () => {
  var prefs = window.plugins.appPreferences.suite("group.settings.boomerang");
  prefs.fetch(val => {
    console.log("Email = " + val);
    this.user_email = val;
  }, err => console.log(err), 'email');


But the view doesn’t refresh with those datas bind to it…

I have to navigate to another page and come back to see them. In fact if click anywhere on the view (like on an input) the datas show up on the view…

Any ideas ?