Looks like the ShopifyTransaction.ShopifyPaymentRequest.PaymentMethod.Data.CancelUrl.AbsoluteUri differs between all Shops we've used for testing including our Prod Shop, and our customer's Prod Shop. The latter has a CancelUrl with a different forma...

Upon redirecting a customer to the cancel_url, Shopify is no longer making the backend API call to establish a new  payment session. Did this change recently? We are not calling paymentSessionReject which would cause this problem and we haven't seen ...