I have an Asus Nexus 7 (Android 4.2.2) in it using Waze 18.104.22.168. I use Waze for about 4 months and great satisfaction. I like Waze. About a week but not from Waze navigation voice commands. Neither via bluetooth or via the loudspeaker. Thank you for your help.
The problem is solved. Waze is not a bug. I accidentally pressed the button with the speaker symbol in the main menu (above the "Navigate"). All OK. Enjoy Waze