You need to fix your address/start position, you are too turned away with the feet from ground up to your head. Your rear knee leaks past your foot as soon as you start moving back away from target. You need to keep your rear knee leveraged inside the foot to allow the rest of torso/shoulder/arm/disc swing back behind it.
https://www.dgcoursereview.com/forum...d.php?t=134167
https://www.dgcoursereview.com/forum...d.php?t=134177
