HWH advised you correctly, Dennis. When auto-leveled, we regularly hear valves release air as the sensors activate the HWH control module while camping.
But if an end or side opposite a leaked down point is already at its lowest, the compressor will come on to raise the lowest point. It will also activate if tank pressure, while in Auto-level Mode, is below 90 psi. Both of these conditions can occur over extended periods of camping.
Joel