The server does not crash, only clients crash with this issue. And this issue only happens on lego_multigames. V2 is the newest version of it and I assume thats whats on the server.
Since it only happens on this map, it's not a plugin issue by itself, but it could be something on the map is interfering with plugins. I don't think its just a map issue though, it doesnt seem to happen at the same time regularly. Just generally at the start of rounds (where everyone is RTDing, so I think aaron might be on to something)