Sui's layer-1 mainnet stalled for the second consecutive day on Friday, May 29, 2026, after an interim patch rushed out Thursday introduced a new failure path that validators hit within hours.

The network's official account posted at approximately 08:00 UTC: "Sui mainnet is currently experiencing a network stall. Network activity may be paused at this time." About three hours later, the team confirmed the day-two issue had been resolved.

The root cause spans both outages. The 1.72 release, which introduced a feature called Address Balances, contained a bug in gas-charging logic. Thursday's fix — applied after more than five hours of downtime — was described by the team as an interim measure "designed to restore functionality to the network while the Sui Core Team worked on a long-term solution." The team acknowledged the interim fix "had a known issue with a low probability of causing a halt." On Friday morning, the network hit exactly that variant.

"Both today's and yesterday's halts are due to the interaction of the 1.72 release, which introduced Address Balances, and gas charging logic," the team wrote Friday. "As of now, the long-term solution has been implemented by validators, fully addressing known issues caused by the original bug, and network activity has resumed."

A full post-mortem is still pending.

The outages compound a pattern. In January 2026, Sui suffered a similar network stall that lasted six hours. That makes three significant outages on Sui mainnet in 2026 alone.

Launched in 2023 by Mysten Labs — which raised a $300 million Series B in 2022 at roughly a $2 billion valuation — Sui was marketed as a high-throughput "Solana-killer." The irony is not lost on observers: it is now replicating the reliability problems that plagued Solana in its earlier years.

SUI traded at $0.901 on Binance at time of writing, down approximately 14% over the past seven days per direct CoinGecko API data, and more than 83% below its January 2025 all-time high of $5.35. Market capitalization stood at approximately $3.61 billion per CoinGecko. The token's decline placed it among the worst performers in the top 100 this week.

Sources: Sui Network official X posts (stall announcement, resolution); Decrypt; Binance public API (SUI/USDT); CoinGecko public API. The "20% weekly decline" figure cited in some coverage was not confirmed by live CoinGecko 7-day chart data at time of writing — the verified 7-day decline was approximately 14% based on a direct API call.