Sui Halts User Transactions Third Time in 48 Hours

Sui’s mainnet stopped processing user transactions three times over a 48-hour period after a recent change to how the network charges gas and a separate bug that appeared during an epoch change.

The first stall began at 7:58 AM EDT, according to the network status page. The team posted an alert on the page that the mainnet was experiencing a “network stall” and warned users that “transactions may be paused at this time. Updates will be shared as soon as they are available.” Engineers applied an interim fix and transaction processing resumed by 11:34 AM EDT.

The team linked the incidents to a recent update to gas-charging logic intended to make certain stablecoin transfers fee-free. The update changed how the network accounts for and charges gas. The Core Team said the earlier repair was an interim measure with a low-probability issue that could cause a halt; a variant of that issue occurred and triggered the morning stall.

Around 4:30 PM EDT the network again paused processing user transactions. Sui attributed that outage to behavior observed during an epoch transition, when validators generated required system transactions but did not process user-submitted transactions. The Core Team is investigating the epoch-change behavior and posted that further updates will be shared as available.

Users on X posted reactions and theories about causes. One account, 0xarthur.sui, suggested a bad actor may have opened short positions before the stall, writing, “A hacker likely opened short positions in advance, just to make Sui crash.” The same account criticized the deployment process and wrote that the fix had been “vibe-coded with AI,” recommending the use of multiple AI models plus manual checks before applying fixes.

The Core Team has been updating the status page and social channels while working on both the interim repairs and a longer-term correction to the gas logic. The interruptions affected normal transaction processing on the network during the reported times.