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, "encryptionMethods",  true);
    this.id = attributes.id || "";
    this.type = getStringOption(attributes.type, ["optional", "required"]);
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.encryptionMethod = new XFAObjectArray();
  }
}
class Event extends XFAObject {
  constructor(attributes) {
    super(TEMPLATE_NS_ID, "event",  true);
    this.activity = getStringOption(attributes.activity, [
      "click",
      "change",
      "docClose",
      "docReady",
      "enter",
      "exit",
      "full",
      "indexChange",
      "initialize",
      "mouseDown",
      "mouseEnter",
      "mouseExit",
      "mouseUp",
      "postExecute",
      "postOpen",
      "postPrint",
      "postSave",