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 default-app routing, first clear the current default for one action and choose the intended app once.
What this covers
- Android default-app routing with this exact failure state
- Diagnosis across system default versus in-app browser and domain-specific verified links
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: open links, calls, messages and files in the intended eligible app.
Isolate the component boundary
ReversibleClear the current default for one action and choose the intended app once. Disable battery optimization for the one app and test with the device kept awake on a single network. Boundary to separate: system default versus in-app browser and domain-specific verified links.
Correct only the proven cause
ReversibleSet the supported default category and adjust verified-link handling. 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. Do not clear app data when changing a default is sufficient.
Evidence ledger
Sources behind this answer
Exact questions