Personnal Car Sound disapear [Xbox]

Hi,
Am i the only one loosing the sound of my car during races?
I play the game on Xbox One since september 29 without issues, but since yesterday i loose my car sound after one race. Right now the volume was fading down at each lap during the Spa 100 Race, until my engine was totally mute. I restarted the game 2 times and i still got no sound on my car… hope my save is not corrupted…
Thx for anybody help.
Babstardeluxe from France