SSO for GW is not getting logoff the session?

Hello All,

We are facing below issue,

1. We logged in to the enterprise portal(7.4), I opened one ui5 application, here some gateway url is getting fired, same gateway url opened in the new tab, data has come(SSO is working).

2. Now i logged out from portal, next in the new tab again I fired the gateway url, data is coming without asking credentials (Here it should show popup for credentials, but its not happening).

Am unable to get the solution.

Please help me.

Thanks,

Preethi