Shopify Buy Button via JS — Cart shows wrong currency

I’ve integrated Shopify via the Buy Button JS Library.
Everythings works correctly, but the cart shows the wrong currency (it shows $ instead of €).
I’ve set up everything correctly via the Shopify Admin Dashboard (at https://domain.myshopify.com/admin). The main currency of the store is set to EUR, and, as mentioned in the docs, I can set the currency via the cart.text.currency parameter. I did this, but it changes nothing. Is this a bug?

My JS code so far:

<script src="//sdks.shopifycdn.com/buy-button/1.0.0/buybutton.js"></script>
<script>
var client = ShopifyBuy.buildClient({
  domain: 'domain.myshopify.com',
  storefrontAccessToken: '2b3xxxxxxxxjh5', // previously apiKey, now deprecated
});

ui = ShopifyBuy.UI.init(client);

ui.createComponent('product', {
  id: 23xxxxxx56,
  node: document.getElementById('my-product'),
  options: {
    "product": {
      "iframe": true
    },
    toggle: {
      "iframe": true
    },
    cart: {
      "iframe": true,
      "popup": false,
      "text": {
        "title": 'Warenkorb',
        "empty": 'Dein Warenkorb ist leer.',
        "button": 'Jetzt bestellen',
        "total": 'Gesamt',
        "currency": 'EUR',
     }
  }
});
</script>

But as visible in the attached image, the cart still shows $ instead of €.

EDIT

I think it’s a bug on the side of Shopify, but I figured out how to overcome it.

I’ve added the moneyFormat option to my createComponent function, which overrides all declared currency indications.

shopifyUI.createComponent('product', {
  id: 23xxxxxx56,
  node: document.getElementById('shopify-button-buy-regular'),
  moneyFormat: '€{{amount_no_decimals}}',
  options: shopifyOptions
});