Sui Network experienced a major disruption where its mainnet stopped producing blocks for about 5 hours and 55 minutes due to a bug introduced in its 1.72 upgrade. The issue was linked to the gas charging logic, which caused validators to fail in reaching consensus and temporarily froze all network activity, including DeFi operations.
The team confirmed the outage on X and later restored operations after deploying a fix, though some validators are still running under degraded performance. A full incident report is expected soon.
This is not an isolated case, as Sui has faced similar downtime before—one in January 2026 lasting over six hours and another in November 2024 caused by a transaction scheduling bug.
During the outage, the SUI token briefly dropped from around $0.95 to $0.89 before recovering to about $0.925, showing only a short-term impact. Earlier in May, the token had rallied strongly to around $1.40 due to staking activity and positive ecosystem news, but it remains lower overall amid broader crypto market weakness.
Technically, the failure happened because the gas fee calculation system broke under a specific edge-case scenario, leading validators to disagree on transaction ordering. This prevented consensus from being finalized, effectively halting the blockchain. Even though the network’s safety mechanisms prevented a fork, the system had to be manually corrected before normal operation could resume.
The incident highlights both the complexity of Layer 1 blockchain upgrades and the ongoing challenge of ensuring stability in high-throughput networks like Sui, especially as they scale and introduce new features.#sui
