It looks to me as if you are coming out of your curve early, so your
last step is run in a straight line. This results in your body being
oriented vertically when you plant your takeoff foot, and to generate
some spin around the bar (so you get sort of horizontal over the bar)
you are starting that spin from an upright position and finishing your
takeoff drive leaned TOWARD the bar. This produces a long, low flight
with too little spin around the bar. You lose height because some of
your takeoff thrust is directed toward the bar (and not upward), and
you get less spin than you need when you are jumping at your limit
resulting in dragging the bar off with your lower body (which should
be spinning up out of the way - but isn't).

The cure for this is to coordinate your approach so that you can stay
in your curve till you get your takeoff foot on the ground. If you
like we can work out an approach that will get you to your takeoff
mark while you are still "in the curve".

Glen