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).
selEnd: event.target.selectionEnd,
              },
            });
          }
          _blurListener(event);
        });
        element.addEventListener("mousedown", event => {
          elementData.beforeInputValue = event.target.value;
          elementData.beforeInputSelectionRange = null;
        });
        element.addEventListener("keyup", event => {
          
          if (event.target.selectionStart === event.target.selectionEnd) {
            elementData.beforeInputSelectionRange = null;
          }
        });
        element.addEventListener("select", event => {
          elementData.beforeInputSelectionRange = [
            event.target.selectionStart,
            event.target.selectionEnd,
          ];
        });
        if (this.data.actions?.Keystroke) {
          
          
          element.addEventListener("input", event => {
            let selStart = -1;
            let selEnd = -1;
            if (elementData.beforeInputSelectionRange) {
              [selStart, selEnd] = elementData.beforeInputSelectionRange;