The suspension is due to the Zomboid server he's hosting. When it was first introduced, he talked about how he paid for it himself to set a server up. "Season 3" of Zomboid was to include a bunch of people, from his genmates to the HomoJPs to even the EN girls, but also non-Hololive talents like rpr and "a few others". He's not doing anything inappropriate with the boys or girls; he shits on management a lot but he genuinely loves his job, and he CONSTANTLY thinks up and writes down new jokes and bits he could do to make his fans laugh.
Most likely what happened is he invited new non-Holo streamers to his server and gave them the IP without clearing it with management first which lead to this, as he talked about resetting everything and preparing the server "tonight".