Two Halts in Two Days @SuiNetwork's mainnet is back online after one of its most disruptive weeks to date. The chain halted twice within 48 hours, both incidents traced to the same root cause
@SuiNetwork's mainnet is back online after one of its most disruptive weeks to date. The chain halted twice within 48 hours, both incidents traced to the same root cause: a crash bug in the gas-charging logic introduced by the 1.72 software release. The first stall, on Thursday, lasted nearly six hours before validators coordinated a patch and restored block production. The interim fix, however, carried a known low-probability flaw. On Friday, the network hit a variant of that flaw and stalled again.
The first outage began around 13:48 UTC on May 28, with blockchain explorers showing frozen checkpoints and no new blocks. Several decentralized applications, including lending protocols, temporarily suspended deposits and withdrawals as a precautionary measure. The disruption lasted more than five hours before a quorum of validators applied a fix and activity resumed.
After the second stall on Friday, the core team moved to a longer-term solution rather than another stopgap. The network's status page confirmed that more than two-thirds of stake had upgraded to the fix and the network was back online, with the team monitoring for further issues. No user funds were lost in either incident.
$SUI fell as much as 8% on the back of the disruption, with the token trading near the $0.91 level during the sell-off. A full incident review is still to come, with the team indicating it will be published in the coming days.
The back-to-back stalls mark the second major downtime event for Sui in 2026. A similar multi-hour outage in January was linked to consensus-related issues. The recurring nature of the incidents is drawing renewed scrutiny over the reliability of the layer-1 network's infrastructure, particularly as Mysten Labs pursues institutional adoption and broader DeFi growth on the chain.
Sources:CoinDesk: Sui blockchain suffers another network outageCrypto Times: Sui blockchain suffers second major outage in 48 hoursFXStreet: Sui restores network activity after five-hour mainnet stall
