scrollTo() doesn't work on iOS

I’m tying to scroll to my category list but on iOS the command does’t work. On Android it’s ok…

Code example:

    @ViewChild(Content) content: Content;

    scrollTo() {
        this.content.scrollTo(0, 100, 200);

  <button ion-button (click)="scrollTo()">Down 100px</button>

On iOS it go down 100px but return to top.
How can I fix this?