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)

setTabIndex(this);
    if (
      !this.ui ||
      this.presence === "hidden" ||
      this.presence === "inactive" ||
      this.h === 0 ||
      this.w === 0
    ) {
      return HTMLResult.EMPTY;
    }
    if (this.caption) {
      
      
      
      delete this.caption[$extra];
    }
    const caption = this.caption
      ? this.caption[$toHTML](availableSpace).html
      : null;
    const savedW = this.w;
    const savedH = this.h;
    if (this.w === "" || this.h === "") {
      let marginH = 0;
      let marginV = 0;
      if (this.margin) {
        marginH = this.margin.leftInset + this.margin.rightInset;
        marginV = this.margin.topInset + this.margin.bottomInset;
      }