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)


this[$extra].columnWidths = columnWidths;
        this[$extra].currentColumn = 0;
      }
    }
    const style = toStyle(
      this,
      "anchorType",
      "dimensions",
      "position",
      "presence",
      "border",
      "margin",
      "hAlign"
    );
    const classNames = ["xfaSubform"];
    const cl = layoutClass(this);
    if (cl) {
      classNames.push(cl);
    }
    attributes.style = style;
    attributes.class = classNames;
    if (this.name) {
      attributes.xfaName = this.name;
    }
    const isSplittable = this[$isSplittable]();
    
    
    
    let maxRun =
      this.layout === "lr-tb" || this.layout === "rl-tb"