It may be coming from the condenser drain under the hood on the passenger side. Add a piece of 1/2" ID tubing to the drain outlet secured with a hose clamp, route so drainage go to the ground. Air when traveling sometimes pushes the water inside on the passenger side, mine was doing the same thing and this fixed it.
2017 Thor Windsport 29M
Dave & Myra FMCA 101070S