[BUG] inline cart does not remember the number of items in the cart after edit shopping cart content

[mcdis]

    <script>
        window.document.getElementById('buy-button').addEventListener('click', function () {
            TwoCoInlineCart.cart.checkout();
        });
        window.document.getElementById('add-button').addEventListener('click', function () {
            TwoCoInlineCart.products.add({
                code    : 'OBPower',
                quantity: 1
            });
        });
    </script>

1. Click Add button (after 1 item in cart)
2. Click buy
3. Edit cart content
4. Increase items in cart (for example increse to 5)
5. Close dialog
6. Again click Buy button
7. [BUG] there isonly 1 item in shopping cart instead 5

[mcdis]

P.S, sorry for making an issue here, but I couldn't find a repository from your library