Sui blockchain stalls again, SUI sinks 8%

Sui blockchain stalled on May 28, halting block production and sending the SUI token down 8%.

Sui blockchain suffered a network stall on May 28, halting block production across its mainnet. The SUI token dropped about 8% as the disruption hit.

The incident marks the layer-1’s second major stall in five months. Sui’s core team posted that the mainnet was experiencing a network stall and that engineers were actively working on a solution, pausing transactions while safeguarding user funds.

What happened to the Sui network

Block explorers showed no new checkpoints for nearly an hour, halting transaction finality across decentralised apps. Engineers said they had identified the issue within roughly 20 minutes and begun deploying a fix.

“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,” the team said.

The stall follows a six-hour consensus outage in January, which crypto.news reported was traced to a validator consensus bug that halted activity while user funds stayed safe.

Why Sui keeps stalling

Sui’s object-centric design and parallel execution deliver high theoretical throughput, but validator coordination under edge cases has repeatedly surfaced reliability questions. A two-hour outage in November 2024 was the network’s first major disruption since its 2023 launch.

The repeated halts arrive during an already fragile stretch. SUI was trading near multi-month lows even before the latest stall, after the network absorbed the $223 million Cetus Protocol hack last year.

A detailed post-mortem is likely to follow, outlining the root cause and preventive measures, as Sui issued after previous incidents.