Normal html tags like , , are not rendering in side

Hi,
I’m using IONIC 3.19.1.

<ion-content padding>
<ion-list>
  <button ion-item *ngFor="let shift of shifts">
    <h2>{{shift.operatorCode}}</h2>
    <p>{{shift.date}}</p>
    <button>hi</button>
  </button>
</ion-list>
<ion-fab  right bottom>
  <button ion-fab [navPush]="shiftSetup"><ion-icon name="add"></ion-icon></button>
</ion-fab>
</ion-content>

in the above code snippet the <h2>{{shift.operatorCode}}</h2> <p>{{shift.date}}</p> are note rendering. Pls see the attachment.