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 (
      typeof PDFJSDev === "undefined" ||
      PDFJSDev.test("!PRODUCTION || TESTING")
    ) {
      assert(
        this.data.defaultAppearanceData,
        "Expected `_defaultAppearanceData` to have been set."
      );
    }
    const { localResources, appearanceResources, acroFormResources } =
      this._fieldResources;
    const fontName =
      this.data.defaultAppearanceData &&
      this.data.defaultAppearanceData.fontName;
    if (!fontName) {
      return localResources || Dict.empty;