Sui Mainnet halts as validators pause; SUI drops 8%

Sui Mainnet stopped producing blocks on May 28, 2026, after validators paused operations during a reported network stall. The native token SUI fell about 8% to roughly $0.91 as engineers worked to restore block production.

The project’s status page flagged a major outage for Mainnet validators beginning around 07:15 PDT. By 07:36 PDT, engineers had identified the cause and began deploying a solution. Blockchain explorers showed no new checkpoints or blocks for nearly an hour, interrupting transaction finality for decentralized applications that rely on the chain.

The Sui Core team posted: “Sui Mainnet is currently experiencing a network stall. The Sui Core team is actively working on a solution. Be aware that transactions may be paused at this time. Updates will be shared as soon as they are available.”

Public RPC nodes remained available for read requests, but settlement and validator coordination were affected, preventing new blocks from being produced and confirmed. Decentralized finance, gaming and stablecoin projects on Sui reported delays in confirming final settlement. Custody services and authorities did not report any loss of user funds related to the stall.

Market data showed SUI trading near $0.91 at the time of the halt, down about 8% from levels before the incident. Similar short-term price declines have followed prior Sui outages even when the network recovered without forks or custodial losses.

Sui launched Mainnet in May 2023 and uses an object-centric Move programming language with parallel execution. The network previously experienced a six-hour consensus divergence in January 2026 and a two-hour scheduling bug in November 2024. In those cases, validators coordinated upgrades and the network resumed operations; teams later published reports aimed at improving testing and detection.

Engineers continued deploying fixes and sharing updates through official channels. A detailed post-mortem is expected after normal operations resume; initial engineer comments pointed to issues with validator coordination and possible consensus or processing logic.