Many years ago my one year old Black and Decker kept flipping the breakers. Got rid of that thing quick after I contacted the company and they put it on report. They had issues with the model before. Wasn't worth me trying to go after getting my money back because I didn't pay much for it. I have not had a problem with electrical in my sewing rooms since, even after replacing the iron with a high wattage Rowenta. But I do make sure the iron is plugged into its own circuit. Just in case.
Glad you did not have a serious fire. I lived in 3 houses (all rentals) growing up that had fires. One was matches to a garage, another was electrical, another was a rubbish fire close to the house. Scary and not fun.