Punch Drunk Achievement

[not mmhmm]

Was doing the achievement just fine without any issue, I'd drink alcohol and take down creatures within 2 turns with any character and I'd get a count of progession, but after hitting 16, it stopped going up and since then I've been continuing the game and getting drunk and dealing final hit blows, possibly 50+ creatures had been taken down while being drunk and her still nothing, any ideas? I've raised this to Larian as well.