With the last patch, I feel like there’s been a regression with the Silent Assassin in Freelancer mode. It works like Hitman 2016: if a target sees us committing an illegal act, it permanently breaks the Silent Assassin. I’m not 100% sure if this started with this patch. See for yourself:
If I recall correctly, SANF behaves like 2016 but SA and SASO do not.
As I understand it, in Freelancer, the only real Silent Assassin is the Prestige Objective, and once it is lost for whatever reason, it is indeed irrevocably lost.
“Silent Assassin - No Firearms” has always failed if the target discovers the crime, even before the patch.
As in 2016, a clean play is required.
This is the way I looks at it as well for Freelancer 
I see, I never realized that. But why this choice, it’s strange, isn’t it?
@Pouki
I can’t help but wonder why the specifications are like this.