Sui mainnet halts for about six hours; SUI slides 8%

May 28, 2026 — Sui's mainnet suffered another network outage, halting block production and preventing transactions from being processed across the ecosystem. The disruption lasted roughly six hours before validators rolled out a fix and operations resumed. According to reports and Sui Status updates, the chain entered a "Major Outage" state, with instability persisting into May 29 as the team continued investigating issues tied to mainnet settlement. Traders reacted quickly, sending the SUI token down as much as 8%. The incident was traced to a crash bug in gas-charging logic introduced with the recent 1.72 software release. Under certain transaction conditions, the affected code path caused validator crashes, breaking consensus and stalling the chain. It marks Sui's second major stall of 2026. The network was deliberately paused on Jan. 14 following a consensus-related issue. In both cases, the problems were linked to software-upgrade bugs, and there was no reported loss of, or risk to, user funds. The outages highlight a broader reliability challenge for high-speed Layer 1 blockchains as they scale. Similar operational strains have surfaced elsewhere, including transaction delays on Base, Coinbase's Ethereum layer-2 network, on Feb. 1 during a surge in activity. As Layer 1 networks compete on throughput and low fees to serve DeFi, gaming, and stablecoin use cases, repeated halts are renewing questions about long-term stability. Market participants are expected to place greater emphasis on demonstrated uptime, while developers may diversify deployments across chains and build dApps designed to handle temporary interruptions. Disclaimer: This article is for informational and educational purposes only and does not constitute financial advice. Coin Edition is not responsible for any losses resulting from the use of content, products, or services mentioned. Readers should exercise caution before taking any action related to the company.