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)


const style = toStyle(this, "border", "margin");
    const ui = this[$getParent]();
    const field = ui[$getParent]();
    const children = [];
    if (field.items.children.length > 0) {
      const displayed = field.items.children[0][$toHTML]().html;
      const values = field.items.children[1]
        ? field.items.children[1][$toHTML]().html
        : [];
      for (let i = 0, ii = displayed.length; i < ii; i++) {
        children.push({
          name: "option",
          attributes: {