I have an HTC one m7 on the latest (lollipop) firmware using viper 8.0 with elemental x 20.1 kernel and xposed alpha for lollipop installed.
I also have a Sony car stereo that is nfc enabled so you can connect your phone via Bluetooth easily in order to stream music and also use the car stereo as a Bluetooth hands-free.
The reason I am posting this is because I am experiencing a bizarre issue. If I enable nfc on the m7 and tap the phone against the nfc area of the car stereo, the phone turns the Bluetooth on, connects with the stereo via Bluetooth on both profiles, hands-free and media (as it is supposed to) but after 20 seconds, the phone switches Bluetooth off and of course gets disconnected from the car stereo.
If I just turn on Bluetooth on my phone and let it connect without using nfc, it work as it should. I have tried with another m7 running kit Kat android and sense and I have the exact same problem. So it shouldn't be a rom issue Anyone else experiencing that?