SUI mainnet resumes normal operations after validator fix

A bug in Sui's gas charging logic knocked the network offline for nearly six hours, marking the second multi-hour outage this year.

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Add us on Google by Editorial Team May. 29, 2026

The Sui mainnet is back online after a bug in its latest software release brought the network to a standstill for roughly 5 hours and 55 minutes. Validators coordinated a fix and upgraded to a patched version, restoring normal checkpoint production on May 29.

The culprit was a flaw in the gas charging logic introduced in Sui’s 1.72 release. In English: the code that calculates how much users pay for transactions broke, and the entire network stopped processing new blocks as a result.

What happened and how it got fixed

The outage began on May 28, when validators running the 1.72 update encountered the bug and stopped producing new checkpoints. No new transactions could be finalized, which effectively froze the network in place.

Recovery wasn’t as simple as flipping a switch. Sui’s consensus mechanism required validators holding more than two-thirds of all staked tokens to upgrade to the patched software before the chain could resume.

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Sui’s safety guarantees held up. No user funds were lost during the disruption, and the network’s design prevented any data inconsistencies from creeping in while the chain was stalled.

DeFi protocols built on Sui were effectively frozen during the outage. Positions couldn’t be adjusted, trades couldn’t execute, and liquidations couldn’t fire.

A pattern emerging

This wasn’t Sui’s first rodeo with extended downtime in 2026. Back on January 14, the network experienced a similar multi-hour stall lasting approximately 6 hours, that time caused by a consensus commit bug.

Two outages of this magnitude in roughly five months is a trend that’s hard to ignore. Both incidents shared a similar profile: a bug introduced in a software update, followed by a multi-hour scramble to coordinate validator upgrades across the network.

The SUI token reflected investor sentiment in real time. During the outage, the price dropped to approximately $0.89, a decline in the range of 6-8%. It partially recovered after normal operations resumed.

What this means for investors

Sui has positioned itself as a high-throughput Layer 1 blockchain, the kind of infrastructure that’s supposed to support demanding DeFi applications and eventually attract institutional capital. The total value locked across Sui’s ecosystem has grown to hundreds of millions of dollars since the network launched.

For traders, the 6-8% price decline during the outage and partial recovery afterward suggests a playbook the market may repeat if a third incident occurs.

Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.