A feature that drops and returns on a phone or tablet is usually a background battery-optimization or connection-management setting killing it, not failing hardware. For Android notification channels, first open the notification history/channel from a missed alert and send an in-app test.
What this covers
- Android notification channels with this exact failure state
- Diagnosis across app-wide permission versus one disabled channel, Focus and battery restriction
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleNote how long the device was idle or locked before the drop, and whether it correlates with low signal or a Wi-Fi handoff. Expected behavior: deliver each alert category with the selected sound, visibility and priority.
Isolate the component boundary
ReversibleOpen the notification history/channel from a missed alert and send an in-app test. Disable battery optimization for the one app and test with the device kept awake on a single network. Boundary to separate: app-wide permission versus one disabled channel, Focus and battery restriction.
Correct only the proven cause
ReversibleEnable only the needed channel and allow appropriate background activity. Exempt the app from aggressive battery management, or turn off adaptive Wi-Fi/cellular switching for the test.
Verify and stop safely
ReversibleRun the same use pattern that triggered the drop for at least 30 minutes without it recurring. Preserve emergency and security alerts; do not disable all battery protection.
Evidence ledger
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