A phone or tablet producing an unexpected result — wrong location, wrong contact, wrong output — usually traces to a permission, default-app or account setting, not a defect. 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
ReversibleRecord exactly which permission, default app or account is active for the feature. 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. Test with a second account or a different default app assigned to the same action. 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. Correct the permission, default-app assignment or account setting proven by the comparison.
Verify and stop safely
ReversibleRepeat the original action and confirm the correct result with the fix in place. Preserve emergency and security alerts; do not disable all battery protection.
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