SideMenu header is not fixed while focus the textbox in content in iOS device

Ionic Framework ionic-v3
1

I have used the Ionic SideMenu and SideMenu header is move top and hide while focus textbox in iOS device.


<ion-content padding>
  <h3>Ionic Menu Starter</h3>

  <p>
    If you get lost, the <a href="http://ionicframework.com/docs/v2">docs</a> will show you the way.
  </p>
**<input type="text"/>**
  <button ion-button secondary menuToggle>Toggle Menu</button>
</ion-content>

Please suggest how to resolve it?