Fishing Rod cannot cast from boat

When attempting to fish from a boat, the cast always ends up in the same spot - immediately in front of the player on the floor of the boat - regardless of which angle/direction the rod is cast in. This makes fishing from a boat impossible. I have used most of the 1.9 snapshots and 15w36d is the first I have noticed this bug in - it was not present in the 15w35* snapshots.