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, "break",  true);
    this.after = getStringOption(attributes.after, [
      "auto",
      "contentArea",
      "pageArea",
      "pageEven",
      "pageOdd",
    ]);
    this.afterTarget = attributes.afterTarget || "";
    this.before = getStringOption(attributes.before, [
      "auto",
      "contentArea",
      "pageArea",
      "pageEven",
      "pageOdd",
    ]);
    this.beforeTarget = attributes.beforeTarget || "";
    this.bookendLeader = attributes.bookendLeader || "";
    this.bookendTrailer = attributes.bookendTrailer || "";
    this.id = attributes.id || "";
    this.overflowLeader = attributes.overflowLeader || "";
    this.overflowTarget = attributes.overflowTarget || "";
    this.overflowTrailer = attributes.overflowTrailer || "";
    this.startNew = getInteger({
      data: attributes.startNew,
      defaultValue: 0,
      validate: x => x === 1,
    });