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)

delete this[$extra];
  }
  [$getNextPage]() {
    if (!this[$extra]) {
      this[$extra] = {
        numberOfUse: 0,
      };
    }
    const parent = this[$getParent]();
    if (parent.relation === "orderedOccurrence") {
      if (this[$isUsable]()) {
        this[$extra].numberOfUse += 1;
        return this;
      }
    }
    return parent[$getNextPage]();
  }
  [$getAvailableSpace]() {