UPDATED: I am having the same issue. as soon as a a call i make connects, i hear the first second on the call through the car speakers, then he audio returns o the radio and I can see from my phone that the bluestar is no longer paired. I'm in a 2008 saturn astra and using a galaxy s5.
I tired rolling back the firmware to the previous version, but that did not help. Experienced the same issue.
Also tried with an iPhone 4S, and the problem is the same.
Hope to hear a response from the admin.
Also, the music stream does work with the A2DP configuration checked now however - at first its wasn't working or me, but turned out to be user error