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" />`

constructor(root) {
    this.root = root;
    this.datasets = root.datasets;
    if (root.datasets && root.datasets.data) {
      this.data = root.datasets.data;
    } else {
      this.data = new XmlObject(NamespaceIds.datasets.id, "data");
    }
    this.emptyMerge = this.data[$getChildren]().length === 0;
    this.root.form = this.form = root.template[$clone]();
  }
  _isConsumeData() {
    return !this.emptyMerge && this._mergeMode;
  }
  _isMatchTemplate() {
    return !this._isConsumeData();
  }
  bind() {
    this._bindElement(this.form, this.data);
    return this.form;
  }
  getData() {
    return this.data;
  }
  _bindValue(formNode, data, picture) {