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, "field",  true);
    this.access = getStringOption(attributes.access, [
      "open",
      "nonInteractive",
      "protected",
      "readOnly",
    ]);
    this.accessKey = attributes.accessKey || "";
    this.anchorType = getStringOption(attributes.anchorType, [
      "topLeft",
      "bottomCenter",
      "bottomLeft",
      "bottomRight",
      "middleCenter",
      "middleLeft",
      "middleRight",
      "topCenter",
      "topRight",
    ]);
    this.colSpan = getInteger({
      data: attributes.colSpan,
      defaultValue: 1,