We are using WebLogic Server at the backend and F5 LTM load balancer at front. Our SSL certificate is offloaded in F5 and users see https in their browser. But while looking at the packets (using F12) in the user computer and also in the logs of Weblogic server, everything was recorded as http instead of https.
If you are facing similar issue, we fixed it by enabling WebLogic Plugin Enabled option in Weblogic Server.
Understanding the use of Weblogic Plugin Enabled