Attach (recommended) or Link to PDF file here: [form-cms1500.pdf](https://github.com/mozilla/pdf.js/files/5670936/form-cms1500.pdf) (Original opened in Acrobat and checked one radio-button)
Original Source: https://www.cigna.com/static/www-cigna-com/docs/health-care-providers/form-cms1500.pdf

Configuration:
- Web browser and its version: FF 83.0
- Operating system and its version: Win 10 Pro
- PDF.js version: 2.7.355

Steps to reproduce the problem:
1. Open the PDF here: https://mozilla.github.io/pdf.js/web/viewer.html
2. See that all radio-buttons are checked, which is wrong.

What is the expected behavior? (add screenshot)
![grafik](https://user-images.githubusercontent.com/12390057/101734698-f72d3900-3ac0-11eb-817e-94ce276797e8.png)

What went wrong? (add screenshot)
![grafik](https://user-images.githubusercontent.com/12390057/101734712-fc8a8380-3ac0-11eb-833d-412243a7950c.png)

This radio-button field can be found in object `45 0 obj`.
this.container.className = "buttonWidgetAnnotation radioButton";
    const storage = this.annotationStorage;
    const data = this.data;
    const id = data.id;
    const value = storage.getOrCreateValue(id, {
      value: data.fieldValue === data.buttonValue,
    }).value;
    const element = document.createElement("input");
    element.disabled = data.readOnly;
    element.type = "radio";
    element.name = data.fieldName;
    if (value) {
      element.setAttribute("checked", true);
    }
    element.setAttribute("pdfButtonValue", data.buttonValue);
    element.setAttribute("id", id);
    element.addEventListener("change", function (event) {
      const { target } = event;
      for (const radio of document.getElementsByName(target.name)) {
        if (radio !== target) {
          storage.setValue(radio.getAttribute("id"), { value: false });
        }
      }
      storage.setValue(id, { value: target.checked });
    });
    if (this.enableScripting && this.hasJSActions) {
      element.addEventListener("updatefromsandbox", event => {
        const { detail } = event;
        const actions = {
          value() {