it got lost in the fog

Indeed, eta. There's no issue with whatever decided to get lost in the fog. The supposed misty nature of coincidence, is however at issue. I believe that there is nothing foggy about coincidence, per se. It is the 'causation' of the coincidence, that is elusive. And so, an allegorical reference to its mystical nature, I can accept. As in, 'a mystical coincidence'. I would be uncomfortable with, 'a misty coincidence'.