Attach (recommended) or Link to PDF file here:
[occurmin0.pdf](https://github.com/mozilla/pdf.js/files/7340277/occurmin0.pdf)

Configuration:
- Web browser and its version: 95.0a1 (2021-10-13) (64-bit)
- Operating system and its version: Windows 10


Steps to reproduce the problem:
1. Open form in pdf.js

What is the expected behavior? (add screenshot)
Form is blank (subform `nomin`  does not display)
What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/7104454/137184675-d48027c0-1f17-4faa-bc97-b45814b38e36.png)

subform `nomin` displays, even though it's subform is set to `<occur max="-1" min="0" />`

$getChildren,
  $getDataValue,
  $getParent,
  $getRealChildrenByNameIt,
  $hasSettableValue,
  $indexOf,
  $insertAt,
  $isBindable,
  $isDataValue,
  $isDescendent,
  $namespaceId,
  $nodeName,
  $removeChild,
  $setValue,
  $text,
  XFAAttribute,
  XFAObjectArray,
  XmlObject,
} from "./xfa_object.js";
import { BindItems, Field, Items, SetProperty, Text } from "./template.js";
import { createDataNode, searchNode } from "./som.js";
import { NamespaceIds } from "./namespaces.js";
import { warn } from "../../shared/util.js";
const NS_DATASETS = NamespaceIds.datasets.id;
function createText(content) {
  const node = new Text({});
  node[$content] = content;
  return node;
}
class Binder {