The five-year-old finished sixth in a field of 12 but the stewards were not happy with Cowley's ride.
In the inquiry, Cowley stated his instructions were to attempt to get his mount to relax as he had been finishing his races weakly.
Cowley went on to say Balibour ran free early on and, as a result, was stepping at his hurdles, becoming more detached.
While Balibour did make late headway, Cowley put this down to passing tired horses and that he was just staying on at the same pace.
Lavelle confirmed the instructions and expressed herself happy with the ride but the stewards took action.