Since the loss of sound has already been mentioned, this can be reproduced as well as happening at random. Start any custom race. Changing cars, restarting a race, changing track settings, or playing music from Spotify will bug out the audio. The only solution as of now is to restart the game. Even when I don't make those actions while solo playing, it will happen at random times while just browsing decals, buying a car or using scapes. With the absence of tire screech, I realised how important it is to gameplay. Not knowing when your tires are reaching their limits is crucial. Some many times I went in too hot for lack of audible feedback from the tires.