Hi All,   Sorry if I have missed this if it has been posted before, but I am getting a strange jitter of the engine noise from the cockpit at Cruise, its almost like the engine noise is on repeat, but there is a ever so slight gap in the noise when it repeats, so effectually sounds like the sim hangs for a millisecond and then continues, however there is no hang - this happens every 30 seconds or so.   Is anyone else seeing this issue?   Thanks