duplicateItemsAllowed not working

[alicericci]

It's not possible to select the same items twice dispite duplicateItemsAllowed default being true.

  <select multiple>
    <option value="Choice 1">Choice 1</option>
    <option value="Choice 2">Choice 2</option>
    <option value="Find me">Choice 3</option>
    <option value="Choice 4">Choice 4</option>
  </select> 

const element = document.querySelector('select');
const choices = new Choices(element, {
  editItems: true,
  renderSelectedChoices: "always",
});

Expected behavior When clicked, Choice 2 is added to the list even if it's already selected