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

constructor(attributes) {
    super(TEMPLATE_NS_ID, "font",  true);
    this.baselineShift = getMeasurement(attributes.baselineShift);
    this.fontHorizontalScale = getFloat({
      data: attributes.fontHorizontalScale,
      defaultValue: 100,
      validate: x => x >= 0,
    });
    this.fontVerticalScale = getFloat({
      data: attributes.fontVerticalScale,
      defaultValue: 100,
      validate: x => x >= 0,
    });
    this.id = attributes.id || "";
    this.kerningMode = getStringOption(attributes.kerningMode, [
      "none",
      "pair",
    ]);
    this.letterSpacing = getMeasurement(attributes.letterSpacing, "0");
    this.lineThrough = getInteger({
      data: attributes.lineThrough,
      defaultValue: 0,
      validate: x => x === 1 || x === 2,
    });
    this.lineThroughPeriod = getStringOption(attributes.lineThroughPeriod, [
      "all",