(PS4) Got Merciless Killer with Huntress with 3 kills, didn't get Adept

NightingaleFlow

I just received Merciless Killer rating with only 3 kills, even though per the last dev update Merciless is supposed to be 4 kills. Then, even though I got Merciless, I did not get Huntress's Adept.

Character: Huntress

Perks: Hex: Huntress Lullaby, Beast of Prey, Territorial Imperative

Map: Crotus Prenn Asylum

Frequency: Once