Recently got a new Pioneer soundbar, if I play a dvd it's fine, but I have it connected via a optical lead to my tv. When changing channel, sometimes I get audio on a channel other times I just get a click, if I remove the optical lead from the TV or the back of the pioneer then plug it back in, it works. change channel then it wont and will have to repeat the process. I've tried two different optical leads and the same problem, also tried two different inputs on the pioneer, same problem. Any idea at all?