I had this also the other day but it seems OK tonight. Oops, spoke too soon - it's back! There must be something about casting adverts; Sky Sports via Now TV regularly drops out during the breaks, which is even more annoying.
Yep, I have the same thing. First advert that comes on I get a short burst of static noise, this is then repeated every 15-20seconds. After reboot and during sport the sound is fine. Please fix this guys.