Key Takeaways
- Sui’s blockchain experienced a 5-hour and 55-minute shutdown triggered by a software bug in version 1.72
- A critical flaw in the gas charging mechanism led to the complete network failure
- The SUI token plummeted 6.6% to $0.90 throughout the downtime, later bouncing back to approximately $0.93
- The incident represents Sui’s second significant network failure in 2026, with a previous disruption occurring in January
- The network currently maintains $542 million in total value locked distributed across 137 different protocols
On Thursday, the Sui blockchain experienced its second significant network failure of 2026, remaining offline for nearly six hours after a critical software bug triggered a complete shutdown. The disruption sent the SUI token into a sharp decline before it managed to recover a portion of its losses.
The root cause traced back to version 1.72 of the network’s software. A critical flaw in the gas charging mechanism triggered a mainnet collapse, bringing all transaction activity to a complete standstill. Via their official X account, the Sui development team acknowledged the disruption, explaining that operations ceased “due to a halt due to a crash bug in the gas charging logic introduced by the 1.72 release.”
Initially, the network notified users about a “network stall,” cautioning that transaction processing might be temporarily suspended while engineers worked on a solution. The restoration process required almost six hours — precisely 5 hours and 55 minutes — before normal mainnet operations resumed. Following the restart, validators continued experiencing degraded operational capacity.
Impact on SUI Token Value
Market participants reacted swiftly to the news. Throughout the outage, SUI experienced a 6.6% decline, bottoming out at $0.90 according to CoinGecko market data. By early Friday, the cryptocurrency had staged a partial comeback, trading around the $0.93 level.
This downturn arrived mere weeks following an impressive rally for the digital asset. In early May, SUI had climbed approximately 50% to reach $1.41, fueled by multiple favorable catalysts including a Nasdaq-listed entity staking a substantial portion of the token supply.
The development team had also unveiled plans for upcoming enhancements, such as fee-free stablecoin transactions and confidential transfer capabilities. During Consensus 2026, Mysten Labs co-founder Adeniyi Abiodun, representing the organization behind Sui, reinforced these roadmap commitments.
Recurring Network Disruptions
Thursday’s downtime wasn’t the first time users faced such issues. Back in January 2026, the Sui network remained inaccessible for over six hours in a separate incident. Prior to that, in November 2024, validator nodes became trapped in a crash loop for approximately two and a half hours.
This represents the third documented major disruption to the Sui blockchain over the last two years.
Current State of the Sui Ecosystem
Notwithstanding these technical setbacks, Sui continues to hold significant standing within the blockchain ecosystem. Data from DeFiLlama positions it as the 13th-largest network by total value locked, with approximately $542 million distributed across 137 different protocols.
Sui’s mainnet officially launched in May 2023, emphasizing high-speed transactions and scalability designed specifically for financial institutions. The development team committed to releasing a comprehensive post-mortem analysis of this latest network failure within the coming days.
Validator nodes continued displaying reduced performance metrics shortly following the network’s return to operational status.
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