SUI Mainnet experiences network stall as Core team works on fix

Sui network, a layer 1 blockchain developed by Mysten Labs, experienced a network outage on Thursday after the project said its mainnet had stalled, temporarily halting transaction processing.

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.

— Sui (@SuiNetwork) May 28, 2026

Sui said on X that its mainnet was experiencing a network stall and that the Sui Core team was actively working on a solution. The project warned that transactions may be paused and said it would share updates as soon as they were available.

The disruption appeared to pause activity across the network, though the team had not disclosed the cause of the issue at press time.

What actually broke

The outage temporarily halted transaction processing on Sui, leaving users unable to move activity through the network while the core team investigated the issue.

The project did not immediately provide technical details on what caused the stall. It also had not said when normal activity would resume at press time.

The incident adds to a series of technical disruptions for Sui, which has previously faced degraded performance and outages, including one earlier this year.

A pattern worth watching

Sui launched in 2023 and is one of several newer layer 1 blockchains competing with Ethereum and Solana by offering high speed transactions and low fees.

Network reliability is a critical issue for chains that market themselves as infrastructure for decentralized finance and gaming applications, where downtime can prevent users from trading, moving assets or interacting with apps.

The Sui team said it would provide further updates as the investigation continues.

What this means for investors

SUI, the network’s native token, was down 4% over the last 24 hours, though broader crypto market conditions were mixed.

The decline came as traders reacted to the network disruption and awaited further details from the Sui team on the cause of the outage and the timeline for recovery.