This is definitely a "your truck" kind of problem. Could be crappy fuel, or a sensor problem, or it was near the temperature limit for spark advance and you poked it hard anyway. The truck has very robust self-protection limits and it will hit the limp mode real quick, especially with heat soak. I ran the MPT 93-PRX for ~30k miles and it was perfect. The Cobb OTS Stage2 93 tune makes more power, but there is nothing "wrong" with the MPT tune(s).
I've tuned vehicles (cars and bikes) into a solid performer with zero problems and driven/ridden it for thousands of miles. Then sell and the new owner immediately **** it up. You can't fix stupid and there is simply no limits to what stupid can do to **** something up.