The agents were supposed to solve tasks alone and were not supposed to be aware of each other's existence. It's more than just mildly interesting that they made contact and spontaneously started to collaborate.
So the story is basically: "Thing that was designed to collaborate with other agents collaborated with other agents"
Think of how complex biological behaviour emerges from relatively simpler (but still complex) chemistry - at some threshold the innocuous chemical reactions tip over into non-obvious effects that one would not predict starting purely from the chemistry. The question is, where is that threshold for AI systems? Have we already reached that threshold? Certainly seems like it to me.
TL;DR: It’s a loose cannon, that’s all I’m saying.