Funny thing is in the first save I continued past summer 216BC, it happened. Since then none of the re-loads have done, they've just stayed for several turns on burning pitchfork.

Course I'm stuck in limbo right now with being unable to get my Hannibal script to work, I may just call it a day and use move_character to bring one of their FM's across (preferably one without any troops, then use create_unit to give him an army).