POST /v2/architect/flows returns a 400 Bad Request when updating a complex IVR via our AppFoundry integration. The payload validates locally but fails on upload.
Retrieve flow ID via GET.
Modify JSON structure to add a new prompt node.
Send PUT request with Content-Type application/json.
Error response indicates invalid node reference in the flow definition. Schema validation passes in Postman but fails in production.
Checking SDK version 3.2.1 against latest API docs. Any known issues with nested node updates?