I've had that happen. Unplug the Roseberg plug. Spray with contact cleaner. Look for small sand or rock. Make sure all the connectors in the cable freely move in and out. This should do it.
If you ride in the winters like I do in the 20's F you may notice an ache from the metal getting really cold. Knee pads will help keep the cold out. I have flextion to 130*. 90 is bullshit