Attach (recommended) or Link to PDF file here:
http://help.adobe.com/en_US/livecycle/11.0/SampleForms/941/Form.pdf

- Web browser and its version: Firefox 89.0.1
- Operating system and its version: Windows 10 10.0.19043.1052
- PDF.js version: commit bdfcdd6f8326f22c135edfa29a341ea4c558f3d1
- Is a browser extension: No

Steps to reproduce the problem:
1. Enable XFA support
2. Open form

What is the expected behavior? (add screenshot)
Page 3 (of 4) renders
![image](https://user-images.githubusercontent.com/7104454/122686842-622e9980-d1e1-11eb-92ab-86fe488560f2.png)

What went wrong? (add screenshot)
Only 3 pages total render in pdf.js
if (ref && !catalog.pageKidsCountCache.has(ref)) {
            catalog.pageKidsCountCache.put(ref, 1); 
          }
          return [obj, ref];
        }
        throw new FormatError(
          "The Linearization dictionary doesn't point " +
            "to a valid Page dictionary."
        );
      })
      .catch(reason => {
        info(reason);
        return catalog.getPageDict(pageIndex);
      });
  }
  getPage(pageIndex) {
    if (this._pagePromises[pageIndex] !== undefined) {
      return this._pagePromises[pageIndex];
    }
    const { catalog, linearization } = this;
    if (this.xfaFactory) {
      return Promise.resolve(
        new Page({
          pdfManager: this.pdfManager,
          xref: this.xref,
          pageIndex,
          pageDict: Dict.empty,
          ref: null,
          globalIdFactory: this._globalIdFactory,
          fontCache: catalog.fontCache,