HarmonyOS 鸿蒙Next 用下面这段代码加载gif动图，为什么拿到的是静止图？

代码如下（代码截取自官方示例https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V13/ts-basic-components-image-V13#%E7%A4%BA%E4%BE%8B2%E4%B8%8B%E8%BD%BD%E4%B8%8E%E6%98%BE%E7%A4%BA%E7%BD%91%E7%BB%9C%E5%9B%BE%E7%89%87）：

[@State](/user/State) pixelMapImg: PixelMap | undefined = undefined;

  aboutToAppear() {
    this.requestImageUrl('https://alliance-communityfile-drcn.dbankcdn.com/FileServer/getFile/cmtyPub/011/111/111/0000000000011111111.20241217165311.93758235127923197058573067433607:50001231000000:2800:323D0060A0AB685F3E009950B115E3C619459B3DB6BF04B57820A69D7B90598A.gif?needInitFileName=true?needInitFileName=true');// 请填写一个具体的网络图片地址
  }

  requestImageUrl(url: string) {
    http.createHttp().request(url, (error: BusinessError, data: http.HttpResponse)=> {
      if (error) {
        console.error(`request image failed: url: ${url}, code: ${error.code}, message: ${error.message}`);
      } else {
        let imgData: ArrayBuffer = data.result as ArrayBuffer;
        console.info(`request image success, size: ${imgData.byteLength}`);
        let imgSource: image.ImageSource = image.createImageSource(imgData);
        class sizeTmp {
          height: number = 100
          width: number = 100
        }
        let options: Record<string, number | boolean | sizeTmp> = {
          'alphaType': 0,
          'editable': false,
          'pixelFormat': 3,
          'scaleMode': 1,
          'size': { height: 100, width: 100 }
        }
        imgSource.createPixelMap(options).then((pixelMap: PixelMap) => {
          console.error('image createPixelMap success');
          this.pixelMapImg = pixelMap;
        })
      }
    })
  }

  build() {
    Column({space:20}) {
      Image(this.pixelMapImg)
        .alt($r('app.media.startIcon'))
        // .objectFit(ImageFit.None)
        .width(200)
        .aspectRatio(1)

      Image('https://alliance-communityfile-drcn.dbankcdn.com/FileServer/getFile/cmtyPub/011/111/111/0000000000011111111.20241217165311.93758235127923197058573067433607:50001231000000:2800:323D0060A0AB685F3E009950B115E3C619459B3DB6BF04B57820A69D7B90598A.gif?needInitFileName=true?needInitFileName=true')
        .width(200)
        .aspectRatio(1)
    }
  }