Sui Foundation said two bugs introduced in the v1.72 upgrade caused three Sui mainnet outages on May 28 and 29, 2026. The disruptions were linked to gas charging logic and a randomness state bug, with recoveries reported at 13:30 PT on Thursday, 8:30 PT on Friday, and 19:20 PT on Friday. Sui said user funds were never at risk, both bugs have been fixed, and no confirmed transactions were rolled back. A separate report also cited a fourth downtime within 48 hours, though the provided materials do not clarify whether that was distinct from the three officially attributed v1.72-related outages.