Logoff from a UI5 Application

Hi,

I am building Logoff functionality for my UI5 application. I saw from Fiori applications that I need to call the public service "/sap/public/bc/icf/logoff" to achieve logoff. But I see that after I see the logoff page, when I open the application again it logs in without any authentication.

It means that my SSO ticket did not expire yet. The response headers actually show SSO cookie expiry date in 1980 (past) though. I could not debug this logoff service handler class since it is a public service.

Anyone achieved logoff so far for UI5 app?

Please share your experiences.

Thanks

Krishna