Teams to teams calling in microsoft bot

Question

We are using teams to teams calling in bot using CommunicationsClient.it works fine in single middleware application. we configure middleware application url in azure teams's channel webhook, if we initiate call in bot it will reach to middleware application and it works fine. But now we are implementing loadbalancer application and configured loadbalancer url in webhook, if we initiate call it should reach loadbalancer, it should call the middleware application where calls should be handled.

Now i am getting request to loadbalancer application and it is also reaching middleware application but while processing incoming call event, immediately i am getting 408 callee not found error

I have tried multiple solutions it is not working can any one please help me, is that possible to handle the calls like that?