[Koha] Koha SIP2 performing very slow

Hello , I have installed koha 20.11 and am trying to use SIP2. The SIP2 service is responding properly from the server. But there is a lot of delay in data processing from one server to another (means from koha server to Middleware Server). when request sent first time it will return correct response but after second time with another request it display previous response. I have checked our server sip log file, it returns the correct response every time. What can I do to improve SIP performance. is there any way to improve telnet response performance or Middleware Server