innerHTML is not loading in long HTML string in iOS devices

Ionic Framework ionic-v3
1

I am using bypassSecurityTrustHtml but it is not loading smooth in iOS device.

HTML File

<div [innerHTML]="webviewContent"></div>

.TS file

 this._webview.getPage(this.pageName).subscribe((content: any) => {
      this.isLoading = false;
      this.webviewContent = this.sanitizer.bypassSecurityTrustHtml(content);

    }, e => {
      this.isLoading = false;
      this._errorHandler.handle(e.error);
    });