Hiya, we're building a Shopify app for a store to manage subscriptions on top of the subscriptions api. Subscriptions are created using the selling plans and Shopify checkout. Now we want to use our app to manage the subscriptions e.g changing the delivery frequency. To do this, we first created a subscription draft using the `subscriptionContractUpdate` mutation. Then we tried to update the selling plan, it worked but didn't change any of the delivery intervals, just the selling plan name and id. Then we directly updated the intervals. The changes went through but the next billing date would not update, nor are any new orders being created.
So the question is, what is the correct way to update a delivery frequency on a subscriptions created using selling plans? Will futures orders be automatically created once the changes are made or is there something else we need to do?
