My Playbar 5.1 system has developed a strange issue where every so often the audio through the optical sounds distorted. It is like it is crackling. I have only noticed it with Dolby content and it is very distracting in movies. I have bought 2 new optical cables to try and they have the same issue also. I have also isolated both my Cable Box directly into the Playbar with the same issue and an Apple TV 4K via my TV with the same issue. I have therefore isolated the issue to the Playbar.
I reset my whole system to factory settings including sub and rear speakers and it is still having the issue. Anyone from Sonos know what could be happening? Network interference should not be affecting the sound via optical surely? Especially considering music playback is fine?