The death of Bugsy Linoone made the hot battle pause, as both sides stared in shock at the sheer power displayed. The bugs on Darius' side especially, had most of their info and fighting style based around the mechanics of the Supreme System.
Seeing one of their pinnacle members drop dead in a single strike left them collectively confused, as this was not what the script should say.
What had changed?
Naturally, they had no idea about the system's existence, so the only answer they could come up with is that their enemy was just that powerful.
The thing with events like these was that once it had occured, it usually began to recur more and more frequently. With the advent of one Grandmaster attacking, those others who had been looking on with interest and amusement felt the need to step in, if only for the chance to outshine their peers.