Attach (recommended) or Link to PDF file here:
issue13500 (in test corpus)

This regressed when landing #13566. 

What is the expected behavior? (add screenshot)
<img width="664" alt="image" src="https://user-images.githubusercontent.com/942640/122467522-7bc8aa80-cf6f-11eb-9d4d-311eb7c64fb2.png">


What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/942640/122467565-85eaa900-cf6f-11eb-9c10-8a8686ed440c.png)


constructor(attributes) {
    super(TEMPLATE_NS_ID, "medium");
    this.id = attributes.id || "";
    this.imagingBBox = getBBox(attributes.imagingBBox);
    this.long = getMeasurement(attributes.long);
    this.orientation = getStringOption(attributes.orientation, [
      "portrait",
      "landscape",
    ]);
    this.short = getMeasurement(attributes.short);
    this.stock = attributes.stock || "";
    this.trayIn = getStringOption(attributes.trayIn, [
      "auto",
      "delegate",
      "pageFront",
    ]);
    this.trayOut = getStringOption(attributes.trayOut, ["auto", "delegate"]);
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
  }
}
class Message extends XFAObject {