Mccree High Noon not working as it should

Replay Code: TAYDFD
starts at 07:50

as you can see, the high noon skull locked into the Ana, but for some reason it unlocks (Ana’s head is still exposed, even when you play it in slow motion)

it unlocks and when i press fire it shoots Roadhog only, while Ana is not killed by high noon (despite being locked) and not being damaged even a bit, even though Ana is in line of sight