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).
if (!this.data.quadPoints) {
      return null;
    }
    const quadrilaterals = [];
    const savedRect = this.data.rect;
    for (const quadPoint of this.data.quadPoints) {
      this.data.rect = [
        quadPoint[2].x,
        quadPoint[2].y,
        quadPoint[1].x,
        quadPoint[1].y,
      ];
      quadrilaterals.push(this._createContainer(ignoreBorder));
    }
    this.data.rect = savedRect;
    return quadrilaterals;
  }
  /**
   * Create a popup for the annotation's HTML element. This is used for
   * annotations that do not have a Popup entry in the dictionary, but
   * are of a type that works with popups (such as Highlight annotations).
   *
   * @private
   * @param {HTMLDivElement|HTMLImageElement|null} trigger
   * @param {Object} data
   * @memberof AnnotationElement
   */
  _createPopup(trigger, data) {