It’s a bit difficult to find accurate search terms for this, in case it has already been reported somewhere else, i apologize.
The game is very inconsistent with displaying your killer’s information after death.
Sometimes you get a name but no loadout-card, sometimes you get nothing.
Sometimes it definitely shows the wrong killer, someone of whom you know has not even been near you.
Some methods of killing seem to be prone to contain false information, maybe turrets, some explosives, i can’t track it down exactly at this point.
It’s a mess.
Just a few minutes ago i took this screenshot, when I supposedly got killed by a grenade explosion that was suspiciously far away. I have no idea what killed me really.