My 255 has been flawless swimming until last week. Last week after the first set 3 sets it quit recording distance. Had to restart the watch to get it to work again. When I got home I updated it via Garmin Express and restarted it. Today after the first set it stopped recording distance again. Saved the activity and started a new one and again after the first set it stopped. Restarted the watch and then it worked fine for the rest of my swim. Can't figure out why restarting the watch seems to fix the issue. I got a software update on 10/18 and then this started, latest update bug?