Oh the joys of the Ecoboost platform. Sounds like that issue with the F150s where they attach a black plate to the front of the intercooler to increase temps and prevent moisture buildup. Just be glad you weren't going down the highway doing 70 when it threw you in limp mode with traffic behind you.
It makes no sense why Ford didn't go with dual injection on the Ranger like they did with the 2nd generation 3.5. I feel like with this being a 4 banger and the motor always having to work a little harder, carbon buildup is going to be a real issue with these trucks without a catch can installed.