Key Takeaways
- A critical bug in Sui’s 1.72 software release forced the blockchain offline for 5 hours and 55 minutes
- The malfunction impacted the network’s gas charging mechanism, resulting in a complete system halt
- SUI token value declined 6.6% to $0.90 amid the disruption, later rebounding to approximately $0.93
- The incident represents Sui’s second significant network failure in 2026, with a previous event occurring in January
- The blockchain currently secures $542 million in total value locked distributed among 137 protocols
On Thursday, the Sui blockchain encountered its second significant network disruption of 2026, experiencing nearly six hours of downtime after a critical flaw emerged in a recent software upgrade. The network’s native token, SUI, responded with a sharp decline before managing a partial recovery.
The disruption originated from the network’s 1.72 software deployment. A critical defect within the gas charging mechanism triggered a mainnet failure, bringing all transaction activity to a complete standstill. The development team behind Sui acknowledged the situation on X, explaining that network operations had ceased “due to a halt due to a crash bug in the gas charging logic introduced by the 1.72 release.”
Initially, the network informed users of a “network stall,” cautioning that transaction processing might be temporarily suspended while engineers worked on a solution. The resolution took approximately six hours — precisely 5 hours and 55 minutes — before normal operations resumed on the mainnet. Following the restart, validators continued to experience diminished performance levels.
SUI Token Market Reaction
Market participants reacted swiftly to the outage. According to data from CoinGecko, SUI experienced a 6.6% decline, bottoming out at $0.90 during the network disruption. By early Friday, the token had staged a modest comeback, trading around the $0.93 level.
This setback arrived just weeks following an impressive rally for the digital asset. In early May, SUI had climbed approximately 50% to reach $1.41, propelled by multiple favorable catalysts, including a significant staking commitment from a Nasdaq-listed corporation.
The development team had previously announced forthcoming enhancements, including fee-free stablecoin transactions and confidential transfer capabilities. At Consensus 2026, Adeniyi Abiodun, co-founder of Mysten Labs—the organization developing Sui—confirmed these planned features.
Recurring Network Disruptions
This week’s downtime wasn’t an anomaly for the network. Earlier in January 2026, Sui experienced another prolonged outage exceeding six hours. Additionally, in November 2024, the entire validator network became trapped in a crash loop for roughly two and a half hours.
This represents the third documented major interruption to the Sui blockchain within a two-year timeframe.
Current Network Standing
Notwithstanding these technical setbacks, Sui maintains a prominent position within the blockchain ecosystem. Data from DeFiLlama indicates the network holds the 13th position by total value locked, with approximately $542 million distributed across 137 different protocols.
The Sui mainnet officially launched in May 2023, emphasizing rapid transaction processing and scalability designed for financial institutions. The development team announced that a comprehensive post-mortem analysis of the most recent outage would be released within the next few days.
Validator performance remained suboptimal in the immediate period following the network’s restoration.
