Good question Zag. I have no idea. From the sounds like the beacon was turned off to me, but they don't explicitly state that either. Regardless, when you are that close in, that shouldn't be much of an issue. A few things come to mind. That person may have had a cell phone on, Go Pro/POV device, or other electronic device. Could have also been a compatibility issue with the beacon, or maybe it was getting out of flux. Hard to say. I am sure CAIC will follow up on it with their findings once they have put more time into it.