I've been having intermittent problems with my Sigma computer, and finally discovered that it's my PB Blaze headlight that's causing the interference, whether on solid or strobe mode. The cheap Bell light I usually have on strobe doesn't cause any problem. It does seem to be finicky even when no lights are on, though. If the sensor isn't set just right, it cuts out easily. I'm about ready to just get a wired one.