Sui Layer-1 Network Back Online After Nearly Six-Hour Outage

The Sui blockchain experienced a “network stall” that halted transaction processing for nearly six hours, marking the second major outage since the project launched in May 2023. During the disruption, new blocks stopped being produced and users were unable to send transactions or execute smart-contract operations before the issue was resolved later in the day. 

The incident began Wednesday morning when the Sui network’s official X account reported a stall and noted that the Sui Core team was actively working on a fix. Validators rolled out a solution by around 4:30 p.m. Eastern Time, after which block production and transaction throughput returned to normal. The Sui Foundation said a full incident report will be released in the coming days as the team investigates the root cause of the outage. 

Despite the downtime — during which more than $1 billion in on-chain assets were temporarily inaccessible — the native SUI token saw minimal impact on price, hovering near previous levels and briefly spiking after the network restored functionality. 

The outage follows a similar stoppage in November 2024, raising reliability questions for the high-throughput chain. Sui was developed by Mysten Labs and uses a parallel transaction-processing model aimed at scaling decentralized applications with low fees.