Attach (recommended) or Link to PDF file here:
https://www.placementsmondiauxsunlife.com/content/dam/sunlife/regional/canada/documents/slgi/4839-I-F.pdf

Configuration:

- Web browser and its version: 91.0a1 (2021-07-03) (64-bit)
- Operating system and its version: Windows 10

Steps to reproduce the problem:
1. enableXfa = true
2. Open form

What is the expected behavior? (add screenshot)

![image](https://user-images.githubusercontent.com/7104454/124389449-1ede2b80-dcb5-11eb-98ba-01e1f3d6c6f5.png)


What went wrong? (add screenshot)

![image](https://user-images.githubusercontent.com/7104454/124389460-2c93b100-dcb5-11eb-9768-98ddd2c8f1e7.png)

"draw",
        "field",
        "exclGroup",
        "subform",
        "subformSet",
      ]),
      include: true,
    });
    if (!result.success) {
      if (result.isBreak()) {
        return result;
      }
      
      
      delete this[$extra];
      return HTMLResult.FAILURE;
    }
    style.width = measureToString(this[$extra].width);
    style.height = measureToString(this[$extra].height);
    const html = {
      name: "div",
      attributes,
      children,
    };
    const bbox = [this.x, this.y, this[$extra].width, this[$extra].height];
    delete this[$extra];
    return HTMLResult.success(html, bbox);
  }
}
class Assist extends XFAObject {