I created a pdf for https://github.com/mozilla/pdf.js/pull/14023:
[same_fields(1).pdf](https://github.com/mozilla/pdf.js/files/7168340/same_fields.1.pdf)
The 3 checkboxes have the same name (`Check Box2`) and have the same values (`Off` and `Yes`).
In pdf.js, these checkboxes behave like radio buttons in the same group (which is wrong) because of:
https://github.com/mozilla/pdf.js/commit/1fcffe80349a98378262c8a16f7b50ff34c3fe82
Since they've the same values they must be synced: if one is checked (resp. unchecked) then all others are checked (resp. unchecked).
print: event.detail.print,
        });
      },
      hidden: event => {
        event.target.style.visibility = event.detail.hidden
          ? "hidden"
          : "visible";
        this.annotationStorage.setValue(this.data.id, {
          hidden: event.detail.hidden,
        });
      },
      focus: event => {
        setTimeout(() => event.target.focus({ preventScroll: false }), 0);
      },
      userName: event => {
        
        event.target.title = event.detail.userName;
      },
      readonly: event => {
        if (event.detail.readonly) {
          event.target.setAttribute("readonly", "");
        } else {
          event.target.removeAttribute("readonly");
        }
      },
      required: event => {
        if (event.detail.required) {
          event.target.setAttribute("required", "");
        } else {
          event.target.removeAttribute("required");