The Sui mainnet experienced a major network disruption on Tuesday, January 14, 2026, which brought block and checkpoint production to a complete standstill. The incident, which began in the morning, effectively froze all on-chain activity and transaction processing for over an hour.
The Sui core team acknowledged the issue at approximately 7:18 a.m. PT, confirming the mainnet stall and stating that a fix was being actively implemented. No specific timeline for a full recovery was provided at the time of the announcement, with the team describing the situation as under active investigation. Network explorers, such as SuiScan, showed no new checkpoints being generated, signaling a halt in the consensus and block finalization processes.
The disruption had an immediate and cascading effect on the broader Sui ecosystem. Decentralized applications (dApps) and services reliant on live network data, including SuiScan and Slush, became inaccessible or experienced severely degraded functionality. Users attempting to interact with applications built on Sui encountered delays, failed requests, or unresponsive interfaces.
With block production stalled, all transactions submitted during the outage remained unconfirmed and pending. The on-chain state was effectively frozen until normal operations could resume. The Sui team has not publicly disclosed the root cause of the stall or detailed any additional mitigation steps beyond the initial fix being deployed.
