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)

node[$extra].target = target;
      return true;
    }
    return false;
  }
  if (!(target instanceof ContentArea)) {
    target = null;
  }
  const pageArea = target && target[$getParent]();
  let index;
  if (node.startNew) {
    if (target) {
      const contentAreas = pageArea.contentArea.children;
      index = contentAreas.findIndex(e => e === target) - 1;
    } else {
      index = currentPageArea.contentArea.children.findIndex(
        e => e === currentContentArea
      );
    }
  } else if (target && target !== currentContentArea) {
    const contentAreas = pageArea.contentArea.children;
    index = contentAreas.findIndex(e => e === target) - 1;
  } else {
    return false;
  }
  node[$extra].target = pageArea === currentPageArea ? null : pageArea;
  node[$extra].index = index;
  return true;
}
function handleOverflow(node, extraNode, space) {