Had the same problem on a 2014 Bravo (1.6 mjt as well). For me, the culprit was the windscreen, replaced at some point before I bought the car witht a Pilkington that was not fitted correctly (quite significant leaks during heavy rain and even wind noise at higway speeds with strong headwind). Replaced it at the dealership with the OE part and not a drop of water since then (nor wind noise no matter speed and wind direction).