I just do km3 run, and while almost reach the boss, my luck elix from shazbot has left for 20 sec, I use luck elix kit then to keep the luck elixir still running on.
Voila! Wasting elix kit, just to inform so don't use luck elixir kit I still got luck elix from shazbot.
Idk if it happened with klass or not, hope STS check it out, ty!