Hi, We have a flow that simplified looks like this: 1. The GraphQL API is used to calculate taxes and eligible shipping rates for a given draft order:https://shopify.dev/docs/api/admin-graphql/2024-01/mutations/draftOrderCalculate 2. Then, the draft ...

We are experiencing the exact same problem. With "Carrier and app rates" enabled, both creating and updating a draft order via the Admin REST API will completely ignore the provided "shipping_line" attribute, unless it's set to "custom":true We can a...