Oracle Weblogic with F5 issue,Jsession your session has expired

What can be done to resolve an issue on an oracle weblogic VIP which offloads SSL, The page loads and a "YOUR SESSION HAS EXPIRED" message is popped out,and the page redirects back to login page.

When the backend servers are called directly, no such error is encountered.

I already deployed an iapp for this,and it didn't solve the issue.