Attach (recommended) or Link to PDF file here:
https://www.placementsmondiauxsunlife.com/content/dam/sunlife/regional/canada/documents/slgi/4839-I-F.pdf

Configuration:

- Web browser and its version: 91.0a1 (2021-07-03) (64-bit)
- Operating system and its version: Windows 10

Steps to reproduce the problem:
1. enableXfa = true
2. Open form

What is the expected behavior? (add screenshot)

![image](https://user-images.githubusercontent.com/7104454/124389449-1ede2b80-dcb5-11eb-98ba-01e1f3d6c6f5.png)


What went wrong? (add screenshot)

![image](https://user-images.githubusercontent.com/7104454/124389460-2c93b100-dcb5-11eb-9768-98ddd2c8f1e7.png)

pageArea = pageAreas[0];
    }
    pageArea[$extra] = {
      numberOfUse: 1,
    };
    const pageAreaParent = pageArea[$getParent]();
    pageAreaParent[$extra] = {
      numberOfUse: 1,
      pageIndex: pageAreaParent.pageArea.children.indexOf(pageArea),
      pageSetIndex: 0,
    };
    let targetPageArea;
    let leader = null;
    let trailer = null;
    let hasSomething = true;
    let hasSomethingCounter = 0;
    let startIndex = 0;
    while (true) {
      if (!hasSomething) {
        mainHtml.children.pop();
        
        if (++hasSomethingCounter === MAX_EMPTY_PAGES) {
          warn("XFA - Something goes wrong: please file a bug.");
          return mainHtml;
        }
      } else {
        hasSomethingCounter = 0;
      }
      targetPageArea = null;
      this[$extra].currentPageArea = pageArea;