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).
const storage = this.annotationStorage;
    const id = this.data.id;
    this.container.className = "textWidgetAnnotation";
    let element = null;
    if (this.renderForms) {
      
      
      
      const storedData = storage.getValue(id, {
        value: this.data.fieldValue,
        valueAsString: this.data.fieldValue,
      });
      const textContent = storedData.valueAsString || storedData.value || "";
      const elementData = {
        userValue: null,
        formattedValue: null,
        beforeInputSelectionRange: null,
        beforeInputValue: null,
      };
      if (this.data.multiLine) {
        element = document.createElement("textarea");
        element.textContent = textContent;
      } else {
        element = document.createElement("input");
        element.type = "text";
        element.setAttribute("value", textContent);