In some cases, we see the message "You are already logged-in" being displayed during user's authentication to applications accessed in the same browser.

For example:

1) Open http://localhost:8081/auth/admin in browser tab1. Login page is shown
2) Open http://localhost:8081/auth/admin in browser tab2. Login page is shown
3) Authenticate as admin/admin in tab2. I am redirected to admin console
4) Switch to tab1 and authenticate as admin/admin. Message "You are already logged-in" is displayed

See also:

• KEYCLOAK-5179
• https://github.com/keycloak/keycloak/issues/12406