Timeouts are security controls designed to limit exposure when a session is left idle or interrupted.
Many secure services automatically end a session after a period without activity.
Returning to a tab opened much earlier may lead to an expired-state message.
A network change can break the continuity required by a secure session.
Close the expired page and restart from the trusted entry point rather than repeatedly refreshing it.
Timeout periods vary and may be set by organizational security policy.
