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)

import {
  $acceptWhitespace,
  $addHTML,
  $appendChild,
  $childrenToHTML,
  $clean,
  $cleanPage,
  $content,
  $data,
  $extra,
  $finalize,
  $flushHTML,
  $getAvailableSpace,
  $getChildren,
  $getContainedChildren,
  $getExtra,
  $getNextPage,
  $getParent,
  $getSubformParent,
  $getTemplateRoot,
  $globalData,
  $hasSettableValue,
  $ids,
  $isBindable,
  $isCDATAXml,
  $isSplittable,
  $isThereMoreWidth,
  $isTransparent,
  $isUsable,
  $namespaceId,