Defroster/defogger/hvac System Rear Window problems of the 2012 Ford F-150

There was frost on the rear window. While the car was in park and warming up I turned on the rear defroster. I started to smell a burning smell. There was a loud bang and back left window panel completely shattered. No one was injured thankfully, but if the glass would have blown out and we had our baby or passengers in the back there could have been injury. I am not only concerned about the glass shattering, but the fact that there was a burning smell. I have found several forums where people report the same issue across many years of f150s (2010-2019). Defroster is turned on and the back window shatters. I contacted Ford and they will not do anything because the vehicle is out of the warranty period. Sounds like there is something faulty that they need to fix or issue a recall. I reached out to my insurance company and after I get a few quotes I may file a claim depending on the replacement cost and my deductible amount. Only other "symptom" was the smell of burning right before the glass shattered.