Sui mainnet experienced an approximately 6-hour outage on January 14. According to the event review released by the Sui Foundation, the root cause of this failure was an internal disagreement among validators during consensus processing, which led to new checkpoints being unable to be properly certified, and subsequently, transaction submissions also experienced timeouts.

It is worth noting that this was not caused by network congestion or a surge in transaction volume leading to a shutdown, but rather a consensus mechanism issue at the validator level. The foundation also explicitly stated that user funds and account statuses remained completely secure, and there were no instances of certification state forks or transaction rollbacks during this period. This means that although the network was temporarily unable to process new transactions, historical data and user assets were not at any risk.