Using C# to Answer call, it does not trigger OnUpdatedbut "state": "established" when calling the ap

Hi.

I use AnswerAsync from "Microsoft.Graph.Communications.Calls.ICall" in C#, but it never triggers  call.OnUpdated, however when I call the api using postman I see that state is "established":

  call.OnUpdated += triggerupdatecall;
  await call.AnswerAsync(GetMediaConfig(), new []{Microsoft.Graph.Models.Modality.Audio});

response from the api :