Login has an issue, we need to keep relogin even we just loggedin

Relogin (Smart GWT EE API ) relogin relogin relogin relogin Your Session Expired! RELOGIN TO ASAP RELOGIN TO OSCA

relogin get a login window But some of my colleagues, have to relogin and other do not I don't see a different to change this behaviour 0