The second ability is triggered three times, and the damage is counted as usual
What game mode are you talking about ? How do you trigger it three times ?
Are you talking about regular hearthstone, or Battlegrounds, or Mercenaries, or something else?
And what is “the second ability” ?
I believe it’s about Mercenaries, and I think I’ve noticed this recently, yes.
Update: played a bit with Scabbs and tested it while at it. The bug appears consistently at all 3 ranks of the ability (level 5), the second hit animation being the one with apparent actual damage.