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" />`

dataNode[$nodeName] === "data"
      ) {
        break;
      }
      dataNode = dataNode[$getParent]();
    }
    if (!global) {
      return null;
    }
    
    
    generator = this.data[$getRealChildrenByNameIt](
      name,
       true,
       false
    );
    match = generator.next().value;
    if (match) {
      return match;
    }
    
    generator = this.data[$getAttributeIt](name,  true);
    match = generator.next().value;
    if (match && match[$isDataValue]()) {
      return match;
    }
    return null;
  }
  _setProperties(formNode, dataNode) {