HarmonyOS Web 控件加载pdf文件无法监听滚动

Web({
  src: this.url,
  controller: this.jsBridge.controller
})
  .javaScriptAccess(true)
  .javaScriptProxy(this.jsBridge.javaScriptProxy)
  .zoomAccess(false)
  .onPrompt((event) => this.jsPrompt.onJsPrompt(event))
  .onPageBegin((event) => this.webLoad.webPageBegin(event))
  .onPageEnd((event) => {
    WebCookies.syncDefaultApiCookieToWeb(this.url)
    this.webLoad.webPageEnd(event)
  })
  .multiWindowAccess(false)
  .cacheMode(CacheMode.Online)
  .onControllerAttached(() => {
    Timber.tag("Bridge").d("agent -> " + this.jsBridge.controller.getUserAgent())
  })
  .mixedMode(MixedMode.All)
  .domStorageAccess(true)
  .databaseAccess(true)
  .fileAccess(true)
  .imageAccess(true)
  .textZoomRatio(100)
  .password(false)
  .width('100%')
  .height('100%')