Ion-item-divider sticky not working on device

Ionic Framework ionic-v3
1

ion-item-divider sticky is working when i serve on webpage
but its not working when i deploy on device

<ion-list>
<ion-item-group *ngFor="let group of groups">

  <ion-item-divider color="light" sticky>
    <ion-label>
      {{group.date | date: "mediumDate"}}
    </ion-label>
  </ion-item-divider>

  <button ion-item *ngFor="let data of group.group" (click)="goToDetails(data)">
     /////////////
  </button>
</ion-item-group>

the animation for the divider doesn’t work on device , how to address this issue ? thanx