Load new PDF from URL in existing viewSDKCLient

Hi, 

I am basing my code on the ViewSDKClient example. The adobeDCView is created in the constructor of ViewSDKClient, and the ViewSDKClient contains the following function:

previewFile(viewerConfig) {
    const previewFilePromise = this.adobeDCView.previewFile({
      content: {
        location: {
          url: viewerConfig.url,
          /* If the file URL requires some additional headers, then it can be passed as follows:-
          headers: [{ key: "<HEADER_KEY>", value: "<HEADER_VALUE>" }]*/
        },
      },
      metaData: {
        fileName: viewerConfig.fileName,
        id: viewerConfig.fileId,
      }
    }, viewerConfig);
    console.log(`[adobe ${this.config.divId}] file promise:`);
    console.log(previewFilePromise);  // ******* see below ***** 
    return previewFilePromise;
  }

I want to programmatically change from one PDF file to the next. This works when I recreate the ViewSDKClient from scratch with a new URL:

async componentDidMount() {
    console.log(`[adobe ${this.props.divName}] loading ${this.props.fileUrl} (${this.props.fileName})`)
    const viewerConfig = this.configFromProps();
    this.viewSDKClient = new ViewSDKClient(this.props.user, this.upload, this.props.divName);
    this.viewSDKClient.ready().then(() => {
      this.viewSDKClient.previewFile(viewerConfig);
    });
  }

When doing it this way, the promise marked ***** in the first code snippet shows up as fulfilled.

However, loading the PDF takes quite a while, and I thought I could reduce this time if I updated from one URL to another one in the existing ViewSDKClient and adobeDCView, like this:

componentDidUpdate(prevProps) {
    if (this.props.fileUrl && (!prevProps.fileUrl || (this.props.fileUrl !== prevProps.fileUrl))) {
      console.log(`[adobe ${this.props.divName}] will change from ${prevProps.fileUrl} (${prevProps.fileName}) to ${this.props.fileUrl} (${this.props.fileName})`)
      const viewerConfig = this.configFromProps();
      this.viewSDKClient.ready().then(() => {
        console.log(`[adobe ${this.props.divName}] ready to change from ${prevProps.fileUrl} (${prevProps.fileName}) to ${this.props.fileUrl} (${this.props.fileName})`)
        this.viewSDKClient.previewFile(viewerConfig);
      });
    }
  }

There are no error messages, but the content of the PDF frame is not updated, and the promise marked **** in the first code snippet shows up as pending.

Is there some way to load a different PDF file within an existing adobe DCView, or do I have to recreate it from scratch every time I want to show a different PDF file?