Doesn't seem to be. Hopefully the final October build fixes it, because I'm tired of having my controller stop working mid race.
In fact, I've now had it happen twice where the audio starts cutting out, then the controller disconnects from the console for a moment, and then it reconnects, and i can resume playing. However, the audio is gone. So I turn off the controller and turn it back on, and it appears to be on, but I can't control the console and the audio is still gone. I then attempt to re-sync the controller, and it's the same thing. Looks like the controller is on, but the console isn't responding to my inputs. Even tried turning on another controller I have, same thing.
Only a hard reset fixed it. This October update has really annoyed me. Looking forward to being out of the preview program soon.