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
const RECURSION_LIMIT = 10;
    if (!Array.isArray(fields)) {
      return false;
    }
    return fields.every(field => {
      field = this.xref.fetchIfRef(field);
      if (!(field instanceof Dict)) {
        return false;
      }
      if (field.has("Kids")) {
        if (++recursionDepth > RECURSION_LIMIT) {
          warn("_hasOnlyDocumentSignatures: maximum recursion depth reached");
          return false;
        }
        return this._hasOnlyDocumentSignatures(
          field.get("Kids"),
          recursionDepth
        );
      }
      const isSignature = isName(field.get("FT"), "Sig");
      const rectangle = field.get("Rect");
      const isInvisible =
        Array.isArray(rectangle) && rectangle.every(value => value === 0);
      return isSignature && isInvisible;
    });
  }
  get xfaData() {