I had a hair line crack in the strainer that is located between the pump and fresh water tank. It was actually on the back side of the strainer when viewed in place. I did not notice any issues on short trips because I almost never filled the tank and on long trips thought I was just being careless with water use. This spring the crack became worse and the leak became very visible. Water economy has improved with a replacement strainer assembly.
Note the assembly is before the pump, so the usual audible alert for a leak, a pump running back up to pressure, did not happen.