Base Network Stops for Nearly Two Hours After Invalid Block Exposes Single-Sequencer Risk

Base suffered a consensus flaw on Tuesday that produced one invalid block and brought block production to a complete stop, according to on-chain analyst Vadim cited by Odaily Planet Daily. After block height 47,806,542, the network went offline for close to two hours. The incident highlighted the fragility of Base's single-sequencer setup. When the sole sequencer node failed, there were no backup block producers or alternative validation nodes to keep the chain running, leaving on-chain activity at a standstill. During the outage, users were unable to submit transactions or carry out liquidations and withdrawals. Recovery was not fully automatic. Node operators across the ecosystem had to manually restart their nodes before block synchronization gradually resumed. Base has faced similar disruptions before. In August last year, the network froze for 33 minutes after a failure during sequencer switching. The episode underscores a broader risk in some current Layer 2 designs: while a single-sequencer model can improve speed, it also creates a single point of failure that can halt the entire chain if a critical component goes down.