Nope, definitely in fairway and was in a ranked round. As has been pointed out above, my activity shows I did indeed hit a new longest drive but the recorded length appears to be lower by a few yards than that shown when playing the game. I understand that the in game value is rounded to the nearest yard, but this was off by more than a yard...
Still seems like a bug to me, just a different one than I first thought!
Mind you, not counting on the fringe also seems wrong if that's really the case....