[#BNet] We are currently experiencing a DDoS attack, which may result in high latency and disconnections for some players. We are actively working to mitigate this issue.
— Blizzard CS – The Americas (@BlizzardCS) November 24, 2021
現在BattlenetのNA鯖がDDOS攻撃を受けているそうです。一部のユーザーには遅延やDCを引き起こす可能性もあり、現在問題緩和のために取り組んでいるとのこと。