Sui Network back online after ‘crash bug’ causes 6 hour outage

Sui Network is back online after a nearly six-hour outage on Thursday, which it attributed to a bug introduced by an update, marking the layer-1 blockchain’s second period of downtime in 2026.

Sui posted to X on Thursday that activity on its mainnet had resumed after “a halt due to a crash bug in the gas charging logic introduced by the 1.72 release. A full incident review will be shared in the coming days.”

Sui had earlier shared that the blockchain was “experiencing a network stall” and said that transactions could be paused until a fix is rolled out.

The outage lasted 5 hours and 55 minutes, according to the network’s status indicator. Sui mainnet validators are still listed as having “degraded performance.”

Source: Sui

It is the second outage of the Sui blockchain this year, following a similar incident in January where the network was knocked offline for more than six hours. Another incident occurred in November 2024, when all validators were stuck in a crash loop for around two and a half hours, preventing transactions from being processed.

Sui is the 13th-largest blockchain by total value locked at $542 million and hosts 137 protocols, according to analytics platform DefiLlama.

Sui token drops 6.6% before recovery

The Sui ($SUI) token dropped around 6.6% to a low of 90 cents during the outage, according to data from crypto aggregator CoinGecko. It has since recovered slightly and was trading for about 93 cents as of early Friday.

$SUI dropped about 6.6% during the outage. Source: CoinGecko

Earlier this month, the token climbed 50% to $1.41 after several positive developments, including a Nasdaq-listed company staking a large portion of the supply and developers announcing upcoming features, including zero-fee stablecoin transfers and private transactions.

Sui launched its mainnet in May 2023, aiming to be scalable and capable of processing transactions fast enough for financial institutions.

Adeniyi Abiodun, a co-founder of Mysten Labs, the developer of the Sui network, also announced at Consensus 2026 that zero-fee stablecoin transfers would roll out soon and reiterated plans to add a private-transaction feature.

Not all major crypto disruptions this year have stemmed from technical issues. Drift Protocol, a decentralized cryptocurrency exchange, was hacked in April, causing it to temporarily suspend deposits and withdrawals.

Kelp, a liquid restaking protocol, was also targeted by a cyberattack in April, prompting the platform to pause smart contracts for its restaking token (rsETH) while it investigated the incident.