During recent flight, message voice intermittently announced. The skyview screen pfd and ems flickered and Xed with message reading "adhars failure" and "gps out". The unit would then show resetting attitude and would go back to normal. The screen had power the whole time but would announce intermittently. This happened dozens of time during the flight (sometimes just a few seconds and other times minutes between). When back on the ground, everything was normal. Checked connections but all was well. Is this the e-mailed mentioned 14 upgrade issue mentioned a number of weeks ago?