Team notifications use the verified email route saved for that team. A project-specific route takes precedence over the team's default. Changing one team's choice does not change every team's notification inbox.
Check My Notifications in the affected team and any route for the affected project. Account sign-in alerts are a separate account-wide choice. Removing an email or losing access can also invalidate a route. If the saved route is correct but delivery goes elsewhere, report the notification type, team, approximate time, and destination with sensitive details removed. Do not forward sign-in links or security codes as evidence.