Mobile 10 Preview car BT reading text message missing

[MLTPaul]

640. Ever since upgrading to 10 preview, hands free car reading of incoming text messages hasn't worked. Two different vehicles. Two different 640s. Fresh installs on both. 14332 on mine. Both worked flawlessly in their respective cars with 8.1.

Tried unpairing, pairing from the vehicle to the phone, changing Cortana settings for reading incoming messages. Music streams and both vehicles announce the arrival of a message, but won't read or give the option to respond.

Suggestions? Ideas when or not this feature works? Go back to 8.1?
TIA
Paul

 

[MLTPaul]

Latest build, 14342, brought back the car reading text messages.
Also seem to be looking at abnormal battery drain- about 20% worse than the previous build.

Great news is that glance is finally working right- evidently got the proximity sensor system to work right. Pull phone out of pocket and there's the info. Double tap to wake working great as well. Quite possibly tied to each other.
Paul