BlockBeats News, June 1st, Sui's Chinese official announcement of the Mainnet Shutdown Event Review stated that on Pacific Time (UTC-7), May 28, 2026 (Thursday) and May 29 (Friday), the Sui Mainnet experienced three network failures. The first two failures were caused by a crash bug resulting from the interaction between Gas billing logic and the recently released version 1.72 (introducing the Address Balances feature). The repair solution for the Thursday incident was a temporary fix aimed at restoring network operation as quickly as possible while the Sui core team developed a permanent solution. The team was aware of the extremely low probability of this temporary fix causing a network failure but accepted the risk in order to quickly restore Mainnet operation. On Friday morning, the network triggered another variant of this known issue and failed again.

The third failure occurred during the routine Epoch transition on Friday afternoon. When the validation nodes restarted to deploy the Friday morning fix, a long-standing latent randomness state saving bug was triggered, causing the network to fail again.

The downtime is as follows: First: started around 7:00 AM PT on Thursday, restored at 1:30 PM PT; Second: started around 5:00 AM PT on Friday, restored at 8:30 AM PT; Third: started around 1:30 PM PT on Friday, restored at 7:20 PM PT;

The team emphasized that user funds were safe throughout the entire event, and no confirmed transactions were rolled back after network recovery. Currently, Sui verification nodes have fully patched the original Gas Charging and Randomness State vulnerabilities, and network activity has returned to normal.