Ion-toggle change event not working

Hi,

I would like to know why the "change" event is not triggered when changing the toggle state. What am I missing?

html

<ion-item>
  <ion-label>Toggle state</ion-label>
  <ion-toggle [(ngModel)]="theSate" (change)="stateChange($event)" [checked]="_bState" yellow></ion-toggle>
</ion-item>

ts

stateChange(event) {
  do something
}

Thanks