I have a Tangent CD II player which has optical input to a WiiM Amp, however, they seem not to speak to each other particularly well and there is a constant stop/start in the sound even though the CD keeps playing. This used not to be an issue earlier in the year and I was wondering if a firmware update might have caused this. I have tried using different CD players, which all work fine, and different amps, which also work fine. I have tried swapping new, out of the box, WiiM Amps and new, out of the box, Tangent CD II players but the problem persists. If I use the “line in” then I don’t have the issue, so it is isolated to the optical input of which five cables have been tried with the same result.