I just took our 2018 Keystone IMPACT Toy Hauler in last week for some warranty work (bought it July this year) and 1 of the items is the same cold water shut off leaking in the outside shower bay. The bottom of the bay filled up in about an hour after I dried it out.
We had heard our pump running for a short time every now and then but took a couple of trips to figure out what was causing it.