The test file at https://github.com/mozilla/pdf.js/blob/master/test/pdfs/annotation-choice-widget.pdf contains listboxes, which are not rendered correctly when printed right now. These kinds of fields are made by https://github.com/mozilla/pdf.js/blob/master/src/display/annotation_layer.js#L672-L678.

/cc @calixteman 
for (let i = 0, ii = inkList.length; i < ii; i++) {
              buffer.push(
                `${inkList[i].x} ${inkList[i].y} ${i === 0 ? "m" : "l"}`
              );
            }
            buffer.push("S");
          }
          return [points[0].x, points[1].x, points[3].y, points[1].y];
        },
      });
    }
  }
}
class HighlightAnnotation extends MarkupAnnotation {
  constructor(parameters) {
    super(parameters);
    this.data.annotationType = AnnotationType.HIGHLIGHT;
    const quadPoints = (this.data.quadPoints = getQuadPoints(
      parameters.dict,
      null
    ));
    if (quadPoints) {
      const resources =
        this.appearance && this.appearance.dict.get("Resources");
      if (!this.appearance || !(resources && resources.has("ExtGState"))) {
        if (this.appearance) {
          /
          /
          /
          /