This my six year OTTB mare, Ari. I'd like an honest critique of horse and rider(I realize the picture angle is not ideal). From what I can tell my leg has slipped back, maybe because of a pinching knee?
Hard to see, but your heels look a little up. This will stop your lower leg slipping back :) Even if it was your last jump, it's important to ride it as if it was the first fence. Just keep looking up & over :)
Your leg has slipped back, and it does look like it's from you pinching with your knees. If you have trouble with this, practice two-point at the walk and trot and concentrate on opening your knees up and creating more contact with your lower legs. You also seem to be leaning slightly to the side of the fence and looking down. Like HorseyyGal said, it's important to look up and over the fence every time.
As far as I can tell, the horse looks pretty good!