Our shower in a Whitehawk 26SRK leaked in the exact same place, right by the toilet. Talked to the dealer and got that puzzled look, like they had never heard of this leak before.
I asked about caulking the seam where the sides meet the base and was told to go ahead. Hasn't leaked since. Found some beige silicone at the local Menards and while I was at it, I applied a thin layer of caulk to each of the drive rivets that hold the shower sides to the wall, as well as the top and sides of the faucet control base. The silicone matches perfectly.
Mike & Theresa, Madison, WI
2012 Jayco White Hawk 26SRK
2012 Ford F-150 EcoBoost FX4