Attach (recommended) or Link to PDF file here:
https://www.canada.ca/content/dam/ircc/migration/ircc/english/pdf/kits/forms/eimm5669e.pdf
[eimm5669e.pdf](https://github.com/mozilla/pdf.js/files/7225677/eimm5669e.2.pdf)

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: Linux Debian

Steps to reproduce the problem:
1. Look at the bottom of page 2

yield* getContainedChildren(this);
  }
  [$isTransparent]() {
    return true;
  }
  [$isBindable]() {
    return true;
  }
  [$addHTML](html, bbox) {
    const [x, y, w, h] = bbox;
    this[$extra].width = Math.max(this[$extra].width, x + w);
    this[$extra].height = Math.max(this[$extra].height, y + h);
    this[$extra].children.push(html);
  }
  [$getAvailableSpace]() {