- Sui Mainnet experienced a network stall, temporarily halting transaction processing across the blockchain.
- The Sui Core team identified the issue and began deploying a fix while warning users that transactions could be paused.
- The incident follows a previous major outage in January 2026, raising renewed attention to network reliability.
- No indication of user funds being at risk has been reported by the project.
Latest Update: In an update shared at 12:19 UTC, the Sui Core team confirmed that the network stall is under active investigation. The team said transaction activity may remain paused temporarily while engineers work on a fix. Sui also stated that additional updates and a full incident review will be released once the issue is resolved.
Sui Network, the Layer 1 blockchain developed by Mysten Labs, experienced a network outage on Thursday after its mainnet stalled, temporarily preventing transaction processing across the network.
In a statement posted on X, the project said: “Sui Mainnet is currently experiencing a network stall. The Sui Core team is actively working on a solution. Be aware that transactions may be paused at this time. Updates will be shared as soon as they are available.”
The disruption affected the network’s ability to process and finalize transactions, leaving users temporarily unable to complete on-chain activity while engineers investigated the issue. The project did not immediately disclose the technical cause of the outage.
The Sui token also reacted negatively to the network disruption, falling nearly 8%–9% over the past 24 hours amid broader crypto market weakness. SUI traded around the $0.91–$0.92 range as traders responded to concerns surrounding the temporary halt in transaction processing. The outage added short-term pressure on market sentiment, with investors closely monitoring updates from the Sui Core team regarding network recovery and stability.
Core Team Identifies Issue as Mainnet Activity Pauses
According to updates from the project’s status page, the incident was initially flagged as an active investigation before being upgraded to an “Identified” status, indicating that engineers had located the source of the problem and were implementing a solution. Reports from blockchain explorers showed that checkpoint and block production had stalled during the outage, preventing new transactions from being finalized.
Sui warned users that transaction processing could remain paused until the fix was fully deployed. At the time of the initial announcement, the project had not provided a timeline for complete restoration of network operations.
The outage temporarily disrupted activity across applications built on the network, highlighting the importance of continuous transaction finalization for decentralized finance, gaming, and other blockchain-based services operating on Sui.
Sui Faces Another Reliability Test Following January Outage
The latest disruption comes months after Sui experienced a prolonged network stall in January 2026. According to a post-mortem published by the Sui Foundation, that incident was caused by an internal divergence in validator consensus processing, preventing validators from certifying new checkpoints and causing transaction submissions to fail.
At the time, the project stated that no user funds were at risk and that no certified transactions were rolled back. Network operations resumed after validators deployed a coordinated fix and reprocessed consensus data.
The new outage adds to a series of operational disruptions that have affected the blockchain since its launch in 2023. Network reliability remains a key metric for Layer 1 blockchains competing to support decentralized applications at scale, particularly in sectors such as decentralized finance and gaming where uninterrupted transaction processing is critical.
Sui has not yet released a technical post-mortem for the latest incident. The project said additional updates would be provided as the investigation and recovery efforts continue.
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