Attach (recommended) or Link to PDF file here:
http://education.ohio.gov/getattachment/Topics/Special-Education/Preschool-Special-Education/ETR-Preschool-Planning-Form.pdf.aspx

- Web browser and its version: Firefox 89.0.1
- Operating system and its version: Windows 10 10.0.19043.1052
- PDF.js version: commit 5d251a3a3e7bfaa8fbfa07f0b7f9901eb3f999d9
- Is a browser extension: No

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

What is the expected behavior? (add screenshot)
Shapes stay inside table cells
![image](https://user-images.githubusercontent.com/7104454/122572782-1252a580-d01c-11eb-9d0f-5fed46d6f2fe.png)

What went wrong? (add screenshot)
Shapes fall outside cells (among other issues)
![image](https://user-images.githubusercontent.com/7104454/122572885-2d251a00-d01c-11eb-8863-fa3b9969f0ea.png)

width: this.medium.long,
          height: this.medium.short,
        };
      }
    } else {
      warn("XFA - No medium specified in pageArea: please file a bug.");
    }
    this[$childrenToHTML]({
      filter: new Set(["area", "draw", "field", "subform"]),
      include: true,
    });
    
    
    this[$childrenToHTML]({
      filter: new Set(["contentArea"]),
      include: true,
    });
    return HTMLResult.success({
      name: "div",
      children,
      attributes: {
        class: ["xfaPage"],
        id: this[$uid],
        style,
        xfaName: this.name,
      },
    });
  }
}
class PageSet extends XFAObject {