Sui's v1.72 upgrade caused three mainnet outages within ~48 hours due to bugs in gas accounting and validator state handling. Main issue: a change in gas logic created edge cases (negative balances + crash conditions), and a second bug affected validator restart randomness state. Status: a patch has been deployed, the network is back online, and no user funds were lost or reverted. Market impact: SUI is down roughly 15–19% over the week. Outlook: confidence now depends on whether future upgrades avoid further halts and whether validator stability holds under load.