Hello,Since 1 month, my bluetooth disconnects from my car, BT speaker and BT headset randomly. My Z3C is working with Marshmallow sony rom (last update, no custom rom).I have tried a factory reset, 2 times, and it works for 1 or 2 days then, BT Bluestacks TextNow Photomath problem comes back. So, I don't think it is a hardware issue.What can I do to solve this problem ? I can't stand it anymore !!!Thanks for your help !