General :: Google Navigation Keeps Turning Media Volume Down

I'm having some trouble with Google Navigation on my SGS3 from US Cellular. Now, I understand that the volume has been merged together with the media volume, and that's not really my issue.

When I enter Google Navigation, the media volume reads correctly. (I jacked it up to full volume just to test this out. It reads full volume when I start GN.) But when a turn-by-turn direction reads, the volume is really low. If I hit the volume up button during the TTS directions, it shows that the media volume is set very low. I can turn it up while the direction is speaking, and the media volume does increase. But the next time a direction begins saying something, it's quiet and the volume is reset really low again. I have to keep turning the volume up for each turn-by-turn direction!

When I exit GN, the media volume is back to full blast again, just as it was before I entered the app. So, it's obviously something GN is doing. I just don't get why it won't remember my volume setting when I turn it up.

ETA: I tested this again, and it's only a problem if I have a media player fired up. I use n7. When it kills the volume for the media player, it does so for the navigation, too.

Unfortunately, even if I close n7, the volume is still ruined until I stop and restart my Bluetooth connection. If I start Bluetooth and run navigation without the media player, tts works fine.

Apparently the audio issue where it keeps turning my volume down is only when it's not connected to Bluetooth in my car.