Coinbase's Base layer‑2 network resumed block production on Thursday after a roughly two‑hour outage that stopped transaction processing. Base is an Ethereum layer‑2 scaling solution developed by Coinbase. The outage began at 16:03 UTC when Base reported that mainnet block production was unhealthy. By 16:52 UTC the team said it had identified the issue and was pursuing remediation. Transaction processing was halted during the period. Internal nodes were reported to be syncing correctly after the chain resumed. The team advised ecosystem node operators to restart their nodes to restore synchronization. It continues to investigate the root cause, which it described as an invalid block, without specifying whether a software bug or a consensus fault was responsible. The network has not disclosed the cause of the invalid block. The incident marks the first downtime for Base since 2023, following a previous outage in August 2025. The Base team said it will monitor network stability and provide further updates as the investigation proceeds.