Coinbase’s Ethereum Layer-2 network, Base, suffered its first recorded outage on 5 Aug 2025 when block production stopped for roughly half an hour. Blockchain monitors BaseScan and OKLink showed the chain frozen at block height 33,792,704 for about 19 minutes before Coinbase confirmed the full disruption lasted 29-33 minutes. The company attributed the incident to an automatic handoff to an unhealthy mainnet sequencer inside its high-availability cluster. Engineers switched operations to a healthy sequencer, and Base resumed normal block production, according to a status update released later in the day. While transactions are now processing normally, the halt underscores operational risks facing Layer-2 networks that are promoted as faster and cheaper settlement layers atop Ethereum. Coinbase has not reported any loss of user funds but said it is reviewing procedures to prevent a recurrence.