[Branched from an earlier discussion]
I have the plantronics voyager legend paired to an iphone 7 (both fully charged and both latest OS). I can make a call with the Bluetooth connected. After one ring, the phone decides to connect to the phone. I need to click on the "audio" icon (top right) and reconnect to bluetooth.
I'm here to help see what's causing the Bluetooth connectivity issue. When did the problem begin? Just so I understand, does the bluetooth icon disable or does your bluetooth loose connection while the icon is enabled?