I tried making calls on my car BT and they worked fine. Music was working fine. If you all are referring to music info displayed on car stereo then that's working in my case.
Funnily enough, BT calls on headsets are scratchy. Music works fine.
I also tried to work with sd maid pro and there were no freezes or hang ups.
Those that do that usually have the freezing problem, is not a bug of this ROM.
This is the only rom where im very pleasant using the stock kernel, smooth as butter with CPU set at 1.8Ghz even while playing games.
Not a SINGLE force close since i installed and battery last long, at least 10 hours SOT if you use it continously.
Music working good here too , on the car, bluetooth speaker. But i haven't take a call over BT yet.