Tank Monitor Panel

With nice weather lately we have been out waking our PC  from its winter sleep.  With unit connected to shore power I was checking the tank monitor panel and the button for the propane tank showed two solid lights and one light flickering. The battery button showed one solid light and two flickering lights. I disconnected from shore power and it did the same thing. The water buttons each seemed to read properly. I physically checked the propane tank and the gauge at the tank showed full and both of the batteries tested fully charged. We have had weird readings on the monitor for the gray, and black water tanks in the past, but never had any issue with either the propane or battery indicators. Has anyone experienced anything similar?  Any ideas what might be causing this and how to resolve?

I resolved the problem by removing the panel, removing the wiring connector, using a bit of contact cleaner, reseating the connector, and reinstalling the panel. At least for now I seem to be getting  accurate readings from each of the buttons.