Sui mainnet suffers two outages in two days as gas logic bug stalls transactions

Trading activity increased during the outage as users reacted to halted network operations and delayed transaction confirmations.

Though user balances stayed intact on the blockchain network, operations were interrupted, such as slow token transfers, paused DeFi transactions, and inability to transact NFTs and trade.

The incidents highlighted execution risks for traders and DeFi users who rely on timely transaction settlement.

Sui faces its second major disruption of 2026

The outages in May were the second time in the year Sui experienced a major network failure.

During January 2026, there was a different kind of issue with the consensus that caused an outage lasting about five to six hours due to validators failing to validate new checkpoints.

While the January and May incidents had different technical causes, both required coordinated validator intervention to restore normal operations.

Sui confirmed on May 30 that the network had returned to normal operations after validators applied an emergency fix.

According to the team, a full post-incident review will be published soon, outlining the interaction between the Address Balances feature and gas accounting during epoch transitions.

Now, developers are observing if there is a need to redesign the feature, if gas accounting needs more separation from the consensus process, and what other measures are required to avoid such epoch transition issues in the future.