[VIDEO] View not updating after the change in ngFor Array?

This problem is a little bit similar to what happened to me here:

Possible workarounds could be:

listenToEvents(){
    let thisObj = this;
    this.events.subscribe('notifications:update', (notifications) => {
        thisObj._notifications = notifications[0];
    });
  }

Or this:

listenToEvents(){
    let thisObj = this;
    this.events.subscribe('notifications:update', function (notifications) {
        setTimeout (function () { thisObj._notifications = notifications[0]; }, 2000);
    });
  }

Or this:

listenToEvents(){
    let thisObj = this;
    this.events.subscribe('notifications:update', (notifications) => {
        setTimeout (function () { thisObj._notifications = notifications[0]; }, 2000);
    });
  }