Total with coupon code is not changing

Hi,
We have a big problem with the side cart
When we add a product, we have the total which is correct
BUT when we use a coupon code, the total under the cart is not changing, it remains the total without the coupon, which is not good for the customer and the UX
Can you check what’s wrong ?
I think that the problem is on your javascript code, which is responsible of the refresh of the total
Thanks