Attach (recommended) or Link to PDF file here:
[multiple.pdf](https://github.com/mozilla/pdf.js/files/6344777/multiple.pdf)

Steps to reproduce the problem:
1. Write something in a field

What is the expected behavior? (add screenshot)
The 3 fields must have the same value

What went wrong? (add screenshot)
The 2 other fields are empty

The three fields share the same name `Text3`.
It works as expected in Adobe and Chrome.
for (const coordinate of data.vertices) {
      const x = coordinate.x - data.rect[0];
      const y = data.rect[3] - coordinate.y;
      points.push(x + "," + y);
    }
    points = points.join(" ");
    const polyline = this.svgFactory.createElement(this.svgElementName);
    polyline.setAttribute("points", points);
    
    
    polyline.setAttribute("stroke-width", data.borderStyle.width || 1);
    polyline.setAttribute("stroke", "transparent");
    polyline.setAttribute("fill", "none");
    svg.appendChild(polyline);
    this.container.append(svg);
    
    
    this._createPopup(polyline, data);
    return this.container;
  }
}
class PolygonAnnotationElement extends PolylineAnnotationElement {
  constructor(parameters) {
    
    super(parameters);
    this.containerClassName = "polygonAnnotation";
    this.svgElementName = "svg:polygon";
  }
}
class CaretAnnotationElement extends AnnotationElement {