I haven't got an active sports pass to check my end if the Sky Sports channels are out of sync with regards to the audio.
Guessing you have tried backing out of the live sports stream and playing the channel again or rebooting both your playback device and router ?
If you have a NowTV stick or NowTV box then perhaps try going into the device menu and under Audio mode select "stereo" to see if there is any difference as a short term workaround to the audio sync problem.
Would have thought if it was widespread then quite a lot of people would have reported here on the forum (unless your post is the start).
While watching live football and when the presenters are talking or interviewing on the pitch? I remember thinking when watching the huddersfield/boro game midweek it was a bit off. I'll look to see what it's like during tonights match.