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)

}
    if (!isSplittable) {
      unsetFirstUnsplittable(this);
    }
    root[$extra].noLayoutFailure = savedNoLayoutFailure;
    if (this[$extra].attempt === maxRun) {
      if (this.overflow) {
        this[$getTemplateRoot]()[$extra].overflowNode = this.overflow;
      }
      if (!isSplittable) {
        
        
        delete this[$extra];
      }
      return HTMLResult.FAILURE;
    }
    if (this.overflow) {
      const overflowExtra = this.overflow[$getExtra]();
      if (overflowExtra.addTrailer) {
        overflowExtra.addTrailer = false;
        handleOverflow(this, overflowExtra.trailer, availableSpace);
      }
    }
    let marginH = 0;
    let marginV = 0;
    if (this.margin) {
      marginH = this.margin.leftInset + this.margin.rightInset;
      marginV = this.margin.topInset + this.margin.bottomInset;
    }
    const width = Math.max(this[$extra].width + marginH, this.w || 0);