I have encountered the same thing as Skuderian.
I have played a dogfight where my leader shot down a plane and both my planes where undamaged when i lost connection in the last turn.
To my surprise when i checked my pilots in the manage pilot menu, my leader was killed and my wingman lost his cheat death ability.
And when i looked at the leaderboard that mission did register as a mission where my leader did not shoot down any planes
Lost connections are a part of every online game, its just a part of the package, but to lose pilots you grew attached to through something you don't have an influence over is frustrating.