WCF client communication is getting hung with selfsigned certificate in private domain

Question

I have a WCF Duplex channel hosted in server as below

 private void CreateWCFHost()  
        {              
                //Get certificate issuername   
                string certificateThumbprint = GetCertificateThumbprint();                  
                Uri baseTcpUrl = new Uri("net.tcp://" + IP + ":" + serverPort + "/");  
  
                NetTcpBinding tcpBinding = new NetTcpBinding();  
                tcpBinding.PortSharingEnabled = true;  
                    tcpBinding.Security.Mode =  
                        SecurityMode.Transport;  
                    tcpBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.None;  
  
                tcpBinding.CloseTimeout = TimeSpan.MaxValue;  
                tcpBinding.OpenTimeout = TimeSpan.MaxValue;  
                tcpBinding.ReceiveTimeout = TimeSpan.MaxValue;  
                tcpBinding.SendTimeout = TimeSpan.MaxValue;  
                tcpBinding.ReliableSession.InactivityTimeout = TimeSpan.MaxValue;  
                tcpBinding.ReliableSession.Enabled = true;  
                    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;  
                    //Create Channel  
                    serviceHost = new ServiceHost(typeof(CommunicationWrapper), baseTcpUrl);  
  
                    serviceHost.Credentials.ServiceCertificate.SetCertificate(StoreLocation.LocalMachine,  
                        StoreName.Root, X509FindType.FindByThumbprint, certificateThumbprint);  
  
                //Add service end points  
                    serviceHost.AddServiceEndpoint(typeof(IClientRequests), (Binding) tcpBinding, baseTcpUrl);  
  
                //Add service http metadata info so that it can be seen in web when service is running  
                    ServiceMetadataBehavior serviceMetadata =  
                        serviceHost.Description.Behaviors.Find<ServiceMetadataBehavior>();  
  
                if (serviceMetadata == null)  
                {  
                    serviceMetadata = new ServiceMetadataBehavior();  
                    serviceHost.Description.Behaviors.Add(serviceMetadata);  
                }  
         serviceHost.Open();  
 }  

My client code looks like below

 public void StartClient()  
        {  
            baseTcpUrl = new Uri("net.tcp://" + IP + ":" + serverPort + "/");  
            tcpBinding = new NetTcpBinding();  
            tcpBinding.PortSharingEnabled = true;  
            tcpBinding.Security.Mode = SecurityMode.Transport;  
            tcpBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.None;  
  
            tcpBinding.CloseTimeout = TimeSpan.MaxValue;  
            tcpBinding.OpenTimeout = TimeSpan.MaxValue;  
            tcpBinding.ReceiveTimeout = TimeSpan.MaxValue;  
            tcpBinding.SendTimeout = TimeSpan.MaxValue;  
            tcpBinding.ReliableSession.InactivityTimeout = TimeSpan.MaxValue;  
            tcpBinding.ReliableSession.Enabled = true;  
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;  
            string encryptedDnsName = GetCertificateDnsName();  
             
            //Decrypt the DNS name  
            EncryptionFactory encriptionFactory = new EncryptionFactory();  
            var encription = encriptionFactory.GetEncryptionObj(SymetricEncryptionType.AesCryptoServiceProvider);  
            string dnsName = encription.DecryptString(encryptedDnsName);  
              
            //Create EndpointIdentity with the DNS name  
            endpointTcpAddress = new EndpointAddress(baseTcpUrl, new DnsEndpointIdentity(dnsName));  
            serverProxy = new InstanceContext(new ServerRequests(applet));  
  
            Client = new GfnClientRequests(serverProxy, tcpBinding, endpointTcpAddress);  
  
            Client.ClientCredentials.ServiceCertificate.Authentication.CertificateValidationMode =  
                System.ServiceModel.Security.X509CertificateValidationMode.None;  
            Client.ClientCredentials.ServiceCertificate.Authentication.RevocationMode =  
                System.Security.Cryptography.X509Certificates.X509RevocationMode.NoCheck;  
        }  

When i make a call from my client to server using this channel it works fine. But it is not working only in private domain network (with self signed certificate) when i made a call to server it is getting hung for ever.
Debug diag screenshot attached below

Could some one please help me with a solution.