I have attended a Site today, Identified a L5508D1A that was intermittently providing power to the bus (With it connected solely to my USB interface the Unit light on the Interface would be on and off a few minutes at a time. replaced that with a 5508D1D I had in stock, but whilst packing up, I noticed that a L5512RVF had some of the local Override indicators that would sometimes flicker to orange, This is the first time I have seen that and I dont believe it is something that is supposed to happen. has anyone ever seen this?