I'm now having the same problem with the LED strip on my 2014 X23B. Some lights come on and others do not. It's totally random. If I gave it a few minutes, eventually all the LEDs will light up. But, as soon as I turn on the interior lights and put a load on the circuitry, they go out and then start blinking randomly. I suspect a bad connection somewhere, but who know where!
2013 F150 Ecoboost Crew Cab