Google Nav from Android - directions get truncated over Bluetooth

Just got a Prius (2014 Package III.) Wondering if this has happened to anyone else, or if it's my phone:

I have the Display Audio with Entune and Nav. But sometimes it's just easier to use Google Nav from my phone (HTC Sensation, Android 4.0.3,) Phone connects via Bluetooth when I get into the car and everything seems to work - except that if I try to use Google Nav, most all directions get chopped off at the beginning. So "In 1000 feet, turn right on Main Street," might be truncated to "On Main Street" - not very helpful. Seems like the audio stream is somehow not continuous, and it must be reconnecting each time Google Nav speaks - and taking too long to do so.

Curious if others have had this problem - or alternately, have used Google Nav over Bluetooth successfully - so I can at least know if the problem is on the side of the phone or the car. Thanks for any leads!

 

Yeah, that may be what I have to do. Sort of annoying to have to turn the Bluetooth off every time - and I bet I'll often forget until after I start driving and the truncated Google Nav starts speaking. There's no way to tell the Display Audio to disconnect Bluetooth while driving, is there? Didn't see a way to do it in the manual, but it would be much easier/safer to disconnect it on the car than to try to do it on the phone.

 

Hmm, well selecting another audio source eliminates Bluetooth audio from the car's perspective, but it seems like the phone still thinks it's streaming to Bluetooth. The audio (Google Nav) doesn't come out of the phone's speaker, so I can't hear the directions at all.