Thanks for reporting this issue,

Have you considered using 'Conversation_Conversation_Id' property to pass an existing conversation id to allow retaining/resume an existing conversation

Usage: botFrameworkConfig.SetProperty(PropertyId.Conversation_Conversation_Id, conversationId);

FYI @compulim , @cwhitten

Thanks orgads for the sharing the issue with us.

To make sure the setup is right, can you confirm if you have enabled the channel correctly in Azure bot service following this page?