Save bar doesn't show when updating form.polaris_text_field type: :number value using stepper arrows

[BaggioGiacomo]

You can add the save bar by adding data-save-bar=true on the form (more info here)
If you add a form with a numeric input type (form.polaris_text_field type: :number) it works correctly if changing the value by writing a new number manually. If you update the value using the stepper arrows, the save bar doesn't appear

The problem here is that the event is actually fired but bubbles property is missing.

Here's a workaround to temporary fix this:

input.addEventListener("change", (event) => {
  if (!event.bubbles) {
    input.dispatchEvent(
      new Event("change", {
        bubbles: true,
      })
    );
  }
});