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)

this.name = attributes.name || "";
    this.presence = getStringOption(attributes.presence, [
      "visible",
      "hidden",
      "inactive",
      "invisible",
    ]);
    this.relevant = getRelevant(attributes.relevant);
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.w = attributes.w ? getMeasurement(attributes.w) : "";
    this.x = getMeasurement(attributes.x, "0pt");
    this.y = getMeasurement(attributes.y, "0pt");
    this.assist = null;
    this.bind = null;
    this.border = null;
    this.calculate = null;
    this.caption = null;
    this.desc = null;
    this.extras = null;
    this.margin = null;
    this.para = null;
    this.traversal = null;
    this.validate = null;
    this.connect = new XFAObjectArray();
    this.event = new XFAObjectArray();
    this.field = new XFAObjectArray();
    this.setProperty = new XFAObjectArray();
  }
  [$isBindable]() {