Word file used: 
[Formular_T.docx](https://github.com/mozilla/pdf.js/files/6907859/Formular_T.docx)

PDFs generated:
PDF 1: [Formular_T_default.pdf](https://github.com/mozilla/pdf.js/files/6907771/Formular_T_default.pdf)
PDF 2: [Formular_T_changed.pdf](https://github.com/mozilla/pdf.js/files/6907772/Formular_T_changed.pdf)

- PDF.js version: v2.9.359

Steps to reproduce the problem:
1. Create Word Document with Checkbox and check it.
2. Convert Word document to PDF using **Aspose.pdf** (for .net)

3. Extra: Change value of second Checkbox  in PDF 1 and save the file (PDF 2). The new File will show both Checkboxes checked in other browser, but only the newly checked one in PDF.js

Expected:
Checkbox is checked (pdf viewer from adobe/Chrome Version 92.0.4515.107 64-bit)
![image](https://user-images.githubusercontent.com/76941221/127659557-42be1cca-3c90-49b8-b224-70ee85aa1b30.png)

Result:
Checkbox is not checked (Mozilla Firefox/PDF.js)
![image](https://user-images.githubusercontent.com/76941221/127660064-e3cdc3f9-6887-4ae7-af27-d46cded69029.png)



warn("HighlightAnnotation - ignoring built-in appearance stream.");
        }
        /
        const fillColor = this.color
          ? Array.from(this.color).map(c => c / 255)
          : [1, 1, 0];
        const fillAlpha = parameters.dict.get("CA");
        this._setDefaultAppearance({
          xref: parameters.xref,
          fillColor,
          blendMode: "Multiply",
          fillAlpha,
          pointsCallback: (buffer, points) => {
            buffer.push(
              `${points[0].x} ${points[0].y} m`,
              `${points[1].x} ${points[1].y} l`,
              `${points[3].x} ${points[3].y} l`,
              `${points[2].x} ${points[2].y} l`,
              "f"
            );
            return [points[0].x, points[1].x, points[3].y, points[1].y];
          },
        });
      }
    } else {
      this.data.hasPopup = false;
    }
  }
}
class UnderlineAnnotation extends MarkupAnnotation {