Yes it could.
Does the waterpump cycle when nothing is being used? Could be the drain, could be the washing machine itself too.
Do you plan on using that?
Start a list we will tackle it this winter in Fla.
What do the air pressure gauges on the dash read?
If that bus is 4 inches off the ground it has gone down mine is around 11 inches bottom edge of the stainless just forward of the drive tires.