When I am having a call over an online service, like Facebook or WhatsApp, if another service is receiving an incoming call, the Bluetooth headphones stop working, the sound from the call I`m already having switches to the loud speaker and every other sound to the ear piece. This happens across any combination of call services. It does not make any difference if I answer, ignore or reject the second call, the outcome is the same and will stay like that until I restart the phone.
what should I do to prevent the phone from doing that? It`s so frustrating!