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 (maybe.length >= 1) {
      if (maybe.length !== 1 && mustWarn) {
        warn(`XFA - Too many choices to guess the correct font: ${fontName}`);
      }
      this.cache.set(fontName, maybe[0]);
      return maybe[0];
    }
    if (mustWarn && !this.warned.has(fontName)) {
      this.warned.add(fontName);
      warn(`XFA - Cannot find the font: ${fontName}`);
    }
    return null;
  }
}
function selectFont(xfaFont, typeface) {
  if (xfaFont.posture === "italic") {
    if (xfaFont.weight === "bold") {
      return typeface.bolditalic;
    }
    return typeface.italic;
  } else if (xfaFont.weight === "bold") {
    return typeface.bold;
  }
  return typeface.regular;
}
export { FontFinder, selectFont };