My previous question about scoped sniper kills counting for no-scope Challenges, seems like it could be explained by the notification being delayed.
For instance, if the notifications don't trigger while scoped.
Like if it works like this:
I hit the halfway point of the no-scope Challenge, then immediately use the scope and kill some more, the notification doesn't trigger until I un-scope, so it seems like scoped kills count for no-scope, but they don't, and I'm just confused?