TCP reset after 3WHS is complete

Hi Experts,

I am experiencing TCP reset with a virtual server. After the 3 Way Handshake is complete, the VS sends a TCP reset to the client. TLS is enabled. Pool configured for the virtual server are up and working very well. The client has ECN and CWR flags enabled with the Syn flag (Syn, ECN, CWR) in the TCP header so I wonder if it has anything to do with the reset. Please help.