When navigating with Google Maps, she says, for example, "navigating to home" but then there is no further audio. If the radio is on, it mutes at the times and places you would expect to receive a turn notification but no voice. I've also tried with the radio off but it made no difference. If I say "Hey Google, play music" then Spotify comes through loud and clear. I'm sure the turn-by-turn worked about a month ago.... Any ideas please?