In general, you would know that Loud lullaby (aggressive hand cannon) with explosive payload perk cannot kill an opponent by just 2 tapping head. you can see when I hit a headshot, displayed damage is (56+25) for each, but the enemy dies when they took 2 headshot. (even in the kill log it's saying they died at percision shooting, not explosion damage) this bug wasn't gone even after I died and respawned, I have no clue what caused this bug