Sui Mainnet Halts Block Production, SUI Drops 8%
On May 28, 2026, Sui Mainnet experienced a network stall, halting block production for nearly an hour. The Sui core team confirmed the outage and began deploying a fix, pausing transactions while ensuring fund safety. Public RPC nodes remained operational but settlement and validator coordination were impacted. SUI token dropped approximately 8% to $0.91. This is not the first Sui outage; previous incidents include a 6-hour consensus divergence in January 2026 and a 2-hour scheduling bug in November 2024. In each case, the network halted safely and recovered via coordinated validator upgrades with post-mortems. The current stall once again raises reliability questions for Sui's high-throughput architecture. Engineers continue working on resumption, with a detailed post-mortem expected to outline root cause and preventive measures. Short-term volatility may persist, but successful resolution could reinforce confidence in Sui's safety-first design.
Key facts
- Sui Mainnet stalled block production on May 28, 2026.
- SUI token price dropped 8% to $0.91 during the outage.
- Previous Sui outages occurred in Jan 2026 and Nov 2024.
- Engineers identified the issue and are deploying a fix.
- User funds are safe; post-mortem expected after recovery.