Sui Halts Transactions After Another Network Outage, SUI Drops 8%

• On May 28, 2026, Suis mainnet experienced another network outage as SUI token fell 8% after the incident.
• A crash bug in gas charging logic from the recent 1.72 software release with a similar stall recurring on May 29.
• This incident signals rising reliability challenges for high-speed Layer-1 blockchains as they scale.

The Sui (SUI) mainnet experienced a network stall that halted block production and prevented transaction processing, temporarily pausing activity across the ecosystem while validators and developers worked to restore normal operations and resolve the disruption. The incident lasted around six hours due to a consensus commit bug in a recent 1.72 software release, resolved after validators applied a fix.

Suis Mainnet Suffers Another Major Network Disruptions

On May 28, 2026, according to sources, Suis mainnet experienced a network stall that prevented the blockchain from producing new blocks and processing transactions. The outage brought activity across the entire ecosystem, to a halt while the Sui Core team and validators worked to fix the issue. Users were unable to complete transactions until the service was restored.

Additionally, the following day, on May 29, the network experienced another disruption. According to Sui Status, the mainnet remained in a “Major Outage” for two consecutive days, with the issue linked to mainnet settlement. SUI token fell as much as 8% as traders reacted to the outage.

What Caused Suis Second Major Network Stall

The May 28–29, 2026 network stall on Suis mainnet was caused by a crash bug in the gas charging logic that was introduced in the 1.72 software release. The flaw in the gas charging system triggered validator crashes when certain transactions hit the affected code path, breaking consensus and halting block production. This brought the entire network to a stop for about six hours.

Meanwhile, this incident marks the second major stall for Sui in 2026, following the January 14 consensus-related issue that forced the network to be deliberately paused. In both cases, the disruptions stemmed from bugs introduced during software upgrades, with no loss or risk to user funds.

Related: Coinbase Users Face Trading Delays After AWS Outage

What Does This Mean for Future Layer-1 Blockchain Scaling？

This incident underscores a persistent challenge in the sector to achieve massive scale while maintaining uninterrupted reliability. As Layer-1 networks like Sui push the boundaries of speed and low fees to support DeFi, gaming, and stablecoins, these outages reveal the trade-offs involved in aggressive scaling approaches.

Furthermore, Sui is not alone in facing operational issues. Base, Coinbases Ethereum layer-2 network, experienced transaction delays on Feb. 1 during a period of elevated network activity. These incidents have amplified concerns about long-term stability, particularly as the network expands in DeFi, stablecoins, and gaming.

Therefore, while high-performance networks could continue to attract activity, long-term success could depend on delivering both speed and rock-solid availability. Investors and builders are expected to prioritize networks with proven uptime alongside innovation. Developers may diversify across chains or build more resilient dApps that can gracefully handle temporary halts.