I had this a long time ago, way before this recent patch probably some time in january. I don't remember how it happened, i was just playing and saw that a building needed to be repaired in one of my cities that had never been attacked/rioted, then i noticed another and had to go through every building i own repairing the govetnment building. It has never happened since then, just a one off, and i didn't change any data files after it happened, it just didn't happen again...