Current situation:
O/ O/ & - horse reaches ledge, stops as if running into a solid barrier, can't get down without riding over it at high speed or jumping over it. Enemy 2h spammer runs up, kills all, is a hero.
-------------------|________
What should happen:
O/ O/ - horse goes over ledge, free like the wind!
---------------------|__&_______
Legend:
O/ - cheapass enemy 2h spammer
-, _ - ground
| - ledge
& - a brave horseman