Attach (recommended) or Link to PDF file here:
[docOficialPDF.php.pdf](https://github.com/mozilla/pdf.js/files/7159923/docOficialPDF.php.pdf)

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: linux debian
- PDF.js version: built-in viewer
- Is a browser extension: no

Steps to reproduce the problem:
1. Open the pdf page 2
2. Checkbox "Alta" in section 2 must be checked

It works fine with evince.
if (!dict.has("T") && !dict.has("Parent")) {
      warn("Unknown field name, falling back to empty field name.");
      return "";
    }
    
    if (!dict.has("Parent")) {
      return stringToPDFString(dict.get("T"));
    }
    
    
    const fieldName = [];
    if (dict.has("T")) {
      fieldName.unshift(stringToPDFString(dict.get("T")));
    }
    let loopDict = dict;
    const visited = new RefSet();
    if (dict.objId) {