Well, the gameplay is wrong. And is not only because of canon, is because “Venom Mine” is supposed to work exactly as its own name intends: you step onto it and gets intoxicated thus affecting your senses depleting your vital energy. This current iteration is a bad joke (among others - check Massively BUFF Widowmaker, Blizzaaaaarrrd! - General Discussion - Overwatch Forums (blizzard.com)) Blizzard refuses to correct because is afraid of Widowmaker’s haters.