I have been having this problem for months!! I have been told to factory reset my phone …twice…. And nothing works! And no one acts like they have ever heard of this.. until tonight I thought I was crazy and had an app contaminant on my phone. I really hope they can get it resolved before someone has a car accident trying to get it to reconnect to the Bluetooth going down the road…because it’s a constant issue. I’m not resetting my phone again, that was the latest advice, but if anyone finds a fix I would love to hear it… this random partial Bluetooth disconnect issue is a pain.