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, "button",  true);
    this.highlight = getStringOption(attributes.highlight, [
      "inverted",
      "none",
      "outline",
      "push",
    ]);
    this.id = attributes.id || "";
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.extras = null;
  }
  [$toHTML](availableSpace) {
    
    return HTMLResult.success({
      name: "button",
      attributes: {
        id: this[$uid],
        class: ["xfaButton"],
        style: {},
      },
      children: [],
    });
  }
}
class Calculate extends XFAObject {