Attach (recommended) or Link to PDF file here:
https://www.co.lucas.oh.us/DocumentCenter/View/44843/WIBApplicationForm

Configuration:
- Web browser and its version: Firefox Nightly 91.0a1 (2021-06-25) (64-bit)
- Operating system and its version: Windows 10.0.19043.1052
- PDF.js version: N/A

Steps to reproduce the problem:
1. enableXFA in Firefox Nightly
2. Open form

What is the expected behavior? (add screenshot)
Text renders (pg 2)
![image](https://user-images.githubusercontent.com/7104454/123516584-d39b9b80-d66a-11eb-956f-980c084b14af.png)

What went wrong? (add screenshot)
Text is missing 
![image](https://user-images.githubusercontent.com/7104454/123516599-e615d500-d66a-11eb-89ef-c49818e9b579.png)



}
    measure.popFont();
  }
  [$toHTML](availableSpace) {
    const children = [];
    this[$extra] = {
      children,
    };
    this[$childrenToHTML]({});
    if (children.length === 0 && !this[$content]) {
      return HTMLResult.EMPTY;
    }
    return HTMLResult.success({
      name: this[$nodeName],
      attributes: {
        href: this.href,
        style: mapStyle(this.style, this[$globalData].fontFinder),
      },
      children,
      value: this[$content] || "",
    });
  }
}
class A extends XhtmlObject {
  constructor(attributes) {
    super(attributes, "a");
    this.href = attributes.href || "";
  }
}
class B extends XhtmlObject {