(Almost) every time I make a call, the headset first blips and you can see in the dialer that Bluetooth is chosen for sound output.
But just after dialing, the audio is back at the phone (handset earpiece). So I have to switch to Bluetooth again. Then during calls, sometimes the audio is routed back to the phone again.
It always works when you move it back to the Bluetooth headset again but it is very annoying.
Phone has stock 4.4.2-latest.
Any other threads about this? Bugs @ Google? Couldn't find anything..