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Loses Bluetooth communication

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Loses Bluetooth communication

After a while (sometimes a few hours) the phone loses Bluetooth communication. It doesn't matter if I switch Bluetooth off and on, it's still not effectively active. This is easily verified with e.g. BLE Scanner, but it's not just BLE that is affected, as it doesn't find any other devices either.

 

After power cycle Bluetooth will be deactivated (visually) despite being on before the power cycle. Activating it then (either exlicitly or by an app doing it) it will effectively turn it on.

 

This happens every time.

 

Update: When specifically using only BLE Scanner and no other Bluetooth/BLE-using applications running it still fails after a while. This time just after 20 minutes or so. Same post mortem behavior as described above.