Sui Blockchain Network Outage Halts Transactions Again as Mainnet Stalls

The Sui blockchain faced another network disruption on Thursday after its mainnet temporarily stopped processing transactions, marking the second major outage for the layer-1 network this year.

Sui Network Outage Stops Transaction Activity

The Sui team confirmed that the blockchain experienced a “network stall,” causing transactions across the mainnet to pause. In a public update, the project said its core development team was actively working to restore normal operations and investigate the cause of the issue.

The outage temporarily disrupted activity on the network, leaving users unable to process transactions during the incident. At the time of the update, developers had not shared the exact reason behind the technical problem.

Growing Concerns Over Sui Blockchain Reliability

This is not the first technical setback for Sui. The network has faced several performance related problems since late 2024, including another outage earlier in 2026. Repeated disruptions are drawing attention from traders and developers, especially as blockchain reliability remains important for decentralized finance, gaming and payment applications.

 The blockchain has previously faced periods of outages, including one earlier this year.

Sui launched in 2023 as a high- blockchain built to compete with Ethereum and Solana through faster transactions and lower fees. Following the latest outage, SUI token prices dropped around 8% in 24 hours, although the broader crypto market also remained under pressure.