Ah, now there you got my sympathies lol. We ran a Von 5 + 6 and despite saying things have to be killed at the same time at the end numerous times they still got killed. We voiced it and typed it in case folk's speakers/ headphones were off. We used basic English in case they were non English speaking. And still they died. Eventually I came to the conclusion that it was someone "having a joke" and refused to get annoyed to give them the satisfaction.
I don't get it either. But it's there and without doing it that way it's a failure and not just on base three.