Why Notifications Disappear When the App Is Closed
Notifications can appear while an app is open but vanish after it is closed. Learn how operating systems, permissions, payloads, tokens, and delivery logic affect closed-app notifications.
Practical push notification guides, product updates and lessons from building better customer experiences.
Notifications can appear while an app is open but vanish after it is closed. Learn how operating systems, permissions, payloads, tokens, and delivery logic affect closed-app notifications.
Diagnose FCM registration token failures systematically: identify the error class, refresh tokens safely, check project configuration, and remove stale registrations without disrupting delivery.