thread.message.delta missing role property.
The API spec states that the role property is a peer with content, but I’ve not observed it: https://platform.openai.com/docs/api-reference/assistants-streaming/message-delta-object
This result in the C# SDK defaulting to User role for an Assistant message.
Retrieving the entire message by identifier does show a role of Assistant.
Note: Example doesn’t match spec in API docs