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)


if (this.presence === "hidden" || this.presence === "inactive") {
      return HTMLResult.EMPTY;
    }
    if (
      this.breakBefore.children.length > 1 ||
      this.breakAfter.children.length > 1
    ) {
      
      
      warn(
        "XFA - Several breakBefore or breakAfter in subforms: please file a bug."
      );
    }
    if (this.breakBefore.children.length >= 1) {
      const breakBefore = this.breakBefore.children[0];
      if (!breakBefore[$extra]) {
        
        breakBefore[$extra] = true;
        return HTMLResult.breakNode(breakBefore);
      }
    }
    if (this[$extra] && this[$extra].afterBreakAfter) {
      return HTMLResult.EMPTY;
    }
    
    fixDimensions(this);
    const children = [];
    const attributes = {
      id: this[$uid],