Did you have any pain like this ever before the sprain?
I sprained my left (front foot) ankle 2 years ago and to this day, I get stress cramps in it after hard riding for 6 to 8 hours of steeps off piste conditions.
Nope. As for the position, mine is between the fibula and calcaneus. I had some stuff to do yesterday, and didn't get out riding. The pain has reduced significantly. I think it is likely a pressure point due to the j-bars. Tonight I am going to pay more attention to what I am doing in that area while riding.