Water is entering the rear liftgate which fills up during a rain event. This can potentially create problems with the electrical components mounted inside of the liftgate. i.e. Power door release, Rear defog, third bake light, window wiper, rear tail lights. These could short out or maybe cause a fire. It is already causing premature corrosion at the lowest end seam of the panel as the paint it now bubbling and beginning to seperate from the surface. This could also create a structural integrity issue with the liftgate. The rear glass is stationary. Not designed to open. Maybe this is a similar adhesion issue that the 2016 Transit connect had with the windshield which was recentlyn recalled for improper adhesion process/defect aloowing water to enter into the cabin.