I experienced the same type of thing last trip out. Gaskets were good but it seamed to leak from the hose and fitting. Unlocked and backed off the fitting collar then screwed the hose onto the fitting tighter. Tightened the fitting collar and no more leak.
TT: Flagstaff 25FBLS
Previous TT: Jayco, Rockwood and Flagstaff
TV: 2017 F-150 SCREW, 3.5L Ecoboost, 10 speed, 3.55, 7000# GVWR, tow package.