Sui Mainnet Stalls Again Amid Reliability Concerns

Sui Mainnet Stalls Again Amid Reliability Concerns

Sui\’s blockchain experienced another mainnet disruption on Thursday, freezing transactions across the network and raising fresh doubts about its reliability. The outage halted transfers, DeFi activity, swaps, gaming operations, and wallet interactions on what had been one of crypto\’s faster-growing Layer-1 chains.

The Sui team confirmed the issue on X, stating that the mainnet was experiencing a network stall. Developers are actively investigating the cause and plan to release a full incident report later. In the meantime, traders and developers are reassessing the network\’s dependability during a critical growth phase.

Another Outage in Quick Succession

This disruption comes just days after Sui restored operations from a previous five-hour outage linked to a software bug. That earlier incident was traced to a crash bug in the gas charging logic introduced in version 1.72. While validators patched the system and resumed activity, the latest stall has again highlighted ongoing risks around scalability and validator coordination.

The status page classified validators as being in a major outage, while public RPC nodes continued running normally. However, that difference can be misleading because RPC services may still show older blockchain data during validator failures. Validators cannot confirm or finalize new transactions until consensus resumes across the network.

For users, the impact is immediate and noticeable. Transfers can fail, DeFi positions may freeze, and gaming apps or stablecoin payments may stop working. Unlike normal congestion, a network stall halts blockchain progress entirely, even when users continue paying transaction fees.

Stablecoin Expansion Faces Fresh Pressure

The outage comes at a critical expansion phase for Sui\’s ecosystem. The network recently introduced gasless stablecoin transfers covering seven tokens, including USDC and FDUSD. The feature removes transaction fees for eligible transfers and aims to make blockchain payments simpler for both businesses and users.

Also, CME Group launched regulated SUI futures contracts alongside Avalanche products. The move expands institutional access through cash-settled derivatives tied to official CME reference rates.

Past Incidents Highlight Technical Risks

Sui previously faced a major disruption in January 2026 after validators reached conflicting consensus states. The incident halted checkpoint certification for nearly six hours. However, developers said user funds remained safe and no transaction rollbacks occurred.

The latest outage adds to broader security concerns across the Move ecosystem. Researchers recently identified a TrapDoor malware campaign targeting developer environments across Sui, Aptos, and Solana.

Meanwhile, SUI token pressure has reduced in recent trading. CoinMarketCap data shows the token now trades at $0.9256, up 1% in the past 24 hours and about 83% below its January 2025 peak.

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