Ionic4 离子4离子刷新器重新加载整个页面

当我加载无限滚动许多项目，并滚动到顶部加载离子刷新 它再次加载整个页面

        <ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)" pullFactor="1.2">
        <ion-refresher-content pullingIcon="lines" refreshingSpinner="crescent"></ion-refresher-content>
      </ion-refresher>

      <div *ngFor="let item of items" class="maindiv">

   {{item.name}}
    </div>

    <ion-infinite-scroll threshold="100px" id="infinite_scroller" (ionInfinite)="loadData($event)">
      <ion-infinite-scroll-content loadingSpinner="dots"></ion-infinite-scroll-content>
    </ion-infinite-scroll>

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请更清楚地解释问题所在，并分享您的ts代码doRefresh（）中的代码是什么？ts代码已添加

  doRefresh(event) {
    this.page=0;


    setTimeout(() => {
        this.service.list(this.page)
         .subscribe(res => {
           this.items = res;
          event.target.complete();
        });
    }, 1000);
  }