He prolly means the enemy wave that can include up to 4 chaos warriors.
This thread was added on April 07, 2020, with posts from KaelusVonSestiaf, Fatshark_Hedge.
It’s not a bug so much as a result of how things are spawned, which can result in spikes of challenge, sometimes mad challenge. But really, would you want the game to be more restrictive and remove these spikes, so every event has a wholly predictable ‘difficulty’ to it on every run? I’d wager things would get samey. They generate epic clutch moments as well, which are a big hook on what makes high end play so rewarding.