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)

setAccess(this, attributes.class);
    if (!this[$extra]) {
      this[$extra] = Object.create(null);
    }
    Object.assign(this[$extra], {
      children,
      attributes,
      attempt: 0,
      numberInLine: 0,
      availableSpace: {
        width: Math.min(this.w || Infinity, availableSpace.width),
        height: Math.min(this.h || Infinity, availableSpace.height),
      },
      width: 0,
      height: 0,
      prevHeight: 0,
      currentWidth: 0,
    });
    const isSplittable = this[$isSplittable]();
    if (!isSplittable) {
      setFirstUnsplittable(this);
    }
    if (!checkDimensions(this, availableSpace)) {
      return HTMLResult.FAILURE;
    }
    availableSpace = {
      width: this.w === "" ? availableSpace.width : this.w,
      height: this.h === "" ? availableSpace.height : this.h,
    };
    const filter = new Set(["field"]);