First one I've heard of and there are a LOT of them out there. I'd think it would have had to be installed REALLY sloppily for that to happen. Possibly undersized wiring. I just put one in not too long ago there's really nothing to catch on fire. Even if a connection wasn't tight or the contactors stuck, it should blow breakers first. Other than that, it's all circuit board.
2012 Chevy Tahoe LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition