Hmmmm. You’re the first I’ve found who has this working. Did you do anything special outside of just connecting the Cardo to the bike’s Bluetooth?I use the whiz wheel to control the Cardo Packtalk Bold volume all the time, music, phone, or nav. I do have to ensure my phone volume is turned up. If I have it turnd down I can't hear the nav but otherwise hasn't been an issue.
What am I missing?
Do you know what update of the tft software you’re on?