I didn't think I'd see this day come, but I agree with your complaint. It is honestly worse than before, probably because it isn't actually working properly.
Its a bug. Hopefully it gets fixed, because now you can't count how many deaths weren't attack bonus losses.
Take attacker KOs x 3 - attack bonus = true KO count
The only false results are if someone used up bonuses and did not finish the fight yet. So just keep an eye out for unfinished fights