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

attributes.role = "table";
  } else if (obj.layout === "row") {
    attributes.role = "row";
  } else {
    const parent = obj[$getParent]();
    if (parent.layout === "row") {
      if (parent.assist && parent.assist.role === "TH") {
        attributes.role = "columnheader";
      } else {
        attributes.role = "cell";
      }
    }
  }
}
function ariaLabel(obj) {
  if (!obj.assist) {
    return null;
  }
  const assist = obj.assist;
  if (assist.speak && assist.speak[$content] !== "") {
    return assist.speak[$content];
  }
  if (assist.toolTip) {
    return assist.toolTip[$content];
  }
  
  
  return null;
}
function valueToHtml(value) {