grpc: Grpc.Core.Internal.AsyncCall<>.UnaryCall hangs (malformed call status?)

Ver 1.45 (1.46 code is the same) The symptom is hanging in Grpc.Core.Internal.AsyncCall<>.UnaryCall on return unaryResponseTcs.Task.GetAwaiter().GetResult(); line.

The stack trace example is:

[Waiting on Async Operation, double-click or press enter to view Async Call Stacks] Grpc.Core.dll!Grpc.Core.Internal.AsyncCall<GenericRequest, GenericResponse>.UnaryCall(GenericRequest msg) Line 116 C# Grpc.Core.dll!Grpc.Core.Calls.BlockingUnaryCall<GenericRequest, GenericResponse>(Grpc.Core.CallInvocationDetails<GenericRequest, GenericResponse> call, GenericRequest req) Line 25 C# Grpc.Core.dll!Grpc.Core.DefaultCallInvoker.BlockingUnaryCall<GenericRequest, GenericResponse>(Grpc.Core.Method<GenericRequest, GenericResponse> method, string host, Grpc.Core.CallOptions options, GenericRequest request) Line 16 C# Grpc.Core.Api.dll!Grpc.Core.Interceptors.InterceptingCallInvoker.BlockingUnaryCall.AnonymousMethod__3_0<GenericRequest, MGenericResponse>(GenericRequest req, Grpc.Core.Interceptors.ClientInterceptorContext<GenericRequest, GenericResponse> ctx) Line 51 C# Grpc.Core.Api.dll!Grpc.Core.ClientBase.ClientBaseConfiguration.ClientBaseConfigurationInterceptor.BlockingUnaryCall<GenericRequest, GenericResponse>(GenericRequest request, Grpc.Core.Interceptors.ClientInterceptorContext<GenericRequest, GenericResponse> context, Grpc.Core.Interceptors.Interceptor.BlockingUnaryCallContinuation<GenericRequest, GenericResponse> continuation) Line 174 C# Grpc.Core.Api.dll!Grpc.Core.Interceptors.InterceptingCallInvoker.BlockingUnaryCall<GenericRequest, GenericResponse>(Grpc.Core.Method<GenericRequest, GenericResponse> method, string host, Grpc.Core.CallOptions options, GenericRequest request) Line 48 C#

It is happening periodically, the problem how I think is in the next code in of the UnaryCall method:

try
{
  using (profiler.NewScope("AsyncCall.UnaryCall.HandleBatch"))
  {
    HandleUnaryResponse(success, ctx.GetReceivedStatusOnClient(), ctx.GetReceivedMessageReader(), ctx.GetReceivedInitialMetadata());
  }
}
catch (Exception e)
{
  Logger.Error(e, "Exception occurred while invoking completion delegate.");

  **!!! here should be "throw;" !!!**
}

Without that line, in case of HandleUnaryResponse error, unaryResponseTcs will never get neither error, nor value and will wait infinitely.

Also, a test could be added to ensure, the unaryResponseTcs state is not WaitingForActivationcan prior to call GetResult().