Assassin "Home-field advantage" Mastery challenge did not complete

I have attempted the home field advantage challenge for the assassin shell numerous times now. doesnt seem to complete despite all enemies staying in the smoke. i fully killed them too in a matter of seconds. after extracting the challenge is still incomplete

Here is the video proof https://youtu.be/mFKwcDIktNc?si=CDT6NyGBI9HEB3gM

My Bungie ID: Eighty HD#5685
I am playing on Steam

If i could have the challenge manually completed for me i would very much appreciate it. its not easy to do this challenge and it is rather disheartening to have the stars align to have the opportunity to even attempt the challenge, let alone successfully downing three runners all equipped with purple shields all at the same time, and having it not count. Thank you.