Rubbermount_EVO Intermittent, Flickering, False Neutral

Tonight on the interstate, while my '05 XL1200C was in fifth gear, the neutral indicator light began flickering. It would stop flickering when I released the throttle, then begin flickering again when I rolled the throttle on. And as I downshifted on the exit ramp, it was flickering in fourth and third gears as well. But once I came to a stop and began upshifting again, the light stayed off, even at highway speeds.

This is the second time it's done this in the last month.

Any idea what's causing this false, flickering neutral indicator, and what I should fix/adjust to keep it from doing this?