We've been using checkoutDiscountCodeApplyV2 with the Storefront API for ages without any trouble but just today I noticed that after calling checkoutDiscountCodeApplyV2 and getting a success code back from the API, if you then follow the URL to the checkout, the discount is not applied.
If I take that same discount code and apply it manually on the checkout page, it works fine.
For reasons unknown, despite the API returning a success response, discounts applied to the checkout do not appear to actually be applied. Anyone else seeing this?
