Bluetooth connection problems for phone calls and listening to music while using the RingCentral application Android

I'm having two major problems one is I'm noticing that the Bluetooth does not connect when I make phone calls from time to time. It's actually happening quite often I'll initiate a phone call in the Bluetooth just simply is not connected and I cannot force it to connect and have to hang up and call again and hope it connects. Secondly while listening to music when I receive a call the music will pause but that when I hang up the music will show as playing but I cannot hear it because the application is still engaged somehow. I have to actually dismiss the application in the multi-task settings and then restart up the application again to make another phone call. And I have to do this constantly in between phone calls which effectively means I cannot listen to music and make calls.