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 indices = new Set(event.detail.indices);
            const options = event.target.options;
            Array.prototype.forEach.call(options, (option, i) => {
              option.selected = indices.has(i);
            });
            storage.setValue(id, {
              value: getValue(event,  true),
            });
          },
          editable(event) {
            event.target.disabled = !event.detail.editable;
          },
        };
        this._dispatchEventFromSandbox(actions, jsEvent);
      });
      selectElement.addEventListener("input", event => {
        const exportValue = getValue(event,  true);
        const value = getValue(event,  false);
        storage.setValue(id, { value: exportValue });
        this.linkService.eventBus?.dispatch("dispatcheventinsandbox", {
          source: this,
          detail: {
            id,
            name: "Keystroke",
            value,
            changeEx: exportValue,
            willCommit: true,
            commitKey: 1,
            keyDown: false,
          },