Behind the top left of the service panel is a proximity sensor. This senses the presence of the panel using a magnetic field. It sounds like that sensor is going bad or there is an issue with one of the wires.
I would start by testing the prox sensor first as this is the most likely issue. If i remember correct if there is nothing in front of the sensor it should be 0.1ohms, once something magnetic comes in front of it, it should read OL. I may have that backwards but you should see a change when testing. I use a screw driver to test it personally as it doesn't take a large piece of metal to trigger.
PN: 062874 if you need a new one.

Thanks for bumping I'm not sure how I missed this post!