Weeping and Twisting Vines Bone Meal Change

Currently if a Weeping or Twisting Vines reaches the top or bottom of the world they will continue to consume bone meal despite not growing. It seems inconsistent with the fact that they stop if they touch a block. So perhaps every time a player uses bone meal on a weeping or twisting vine it could check and see if the vine has reach the top or bottom of the world and not consume it?