I have a Chatterbox XBI2H Bluetooth motorcycle helmet and an ASUS Zenfone Zoom running Marshmallow. My headset pairs and connects for both phone and media audio. However, whenever I evoke Google Now when "phone audio" is checked in Bluetooth settings, the voice prompt immediately shuts off. This happens consistently, unless "phone audio" is not selected, leaving only "media audio" checked, in which case everything works fine. How can I use Google Now with my headset on both phone and media modes?