True - you want huge throw, to be able to depower and use the full range of these kites.
But as others have said, you are choking the kite, thats quite evident, so pull the adjuster or add some pigtails on the rear lines at the kite.
Also, because you are riding at the "choking point" or over it, but also in general, you will not experience any depower when you push out - as the kite will accelerate and give you a lot more power now, till it eventually drop the power fully when at the edge (unless you ride fast).
A VERY different way than used to - but when you learn, you will find foilkites to have a huge windrange compared to LEIs, upper end is exceptional especially at low speeds, low end is a lot better when you let the kite fly, a win win
Peter