Ionic refresher issue with ionic scroll

I’m using Ionic Refresher in my dashboard page, and also having ionic scroll section. it will scroll along y axis.
whenever I scroll down inside ion-scroll section, ionic refresher also gets triggered.
verison ionic-3

sample code -

  <ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)" [enabled]="true">
    <ion-refresher-content pullingIcon="arrow-dropdown" pullingText="Pull to refresh" refreshingSpinner="circles" refreshingText="Refreshing...">

<ion-scroll style="height: 350px" scrollY="true">
// items to scroll