Iris Coleman
Jun 01, 2026 07:29
Sui blockchain resolves bugs causing three outages and 15+ hours of downtime, with SUI token down 11% since disruptions.
Sui, a Layer-1 blockchain developed by Mysten Labs, deployed a major network upgrade to resolve bugs that caused three outages and over 15 hours of downtime last week, according to the Sui Foundation. The interruptions, which occurred across May 29 and 30, sparked concerns about the network’s reliability and triggered an 11% drop in the SUI token price.
Two of the outages, including one lasting 8 hours and 25 minutes, were linked to bugs introduced in the 1.72 software release. These bugs disrupted gas-charging mechanics, causing transactions to fail and crash the system. An interim fix aimed at restoring functionality inadvertently triggered a third outage due to its own low-probability failure risk, according to the foundation.
“Validators have fully addressed the known issues caused by both the original gas-charging bug and the randomness-state bug,” the foundation stated in its post-upgrade announcement. Importantly, no user funds were at risk, and the network did not revert any committed transactions during the downtime.
Market Fallout and Recovery Efforts
The disruptions weighed heavily on the SUI token. Trading at $0.99 before the outages, it has since slid to $0.88 as of June 1, marking an 11% decline, according to CoinGecko. This follows a volatile month where SUI briefly surged to $1.41 in early May, buoyed by institutional staking and other bullish developments. As of May 25, SUI had a market cap of approximately $4.19 billion.
Beyond fixing the immediate issues, Sui has outlined plans to improve reliability moving forward. These include better failure containment mechanisms, enhanced resilience at the end of epochs, and greater investment in AI tools to assist with diagnostics and monitoring. The network has also pledged to prioritize scalability and seamless transaction processing, a key part of its pitch to mainstream institutions since its mainnet launch in May 2023.
Historical Context: Not the First Outage
This is not the first time Sui has faced operational challenges. In January 2026, the network experienced a six-hour outage, and a similar incident occurred in November 2024 when validators were stuck in a crash loop for 2.5 hours. Despite these setbacks, Sui remains the 13th-largest blockchain by total value locked ($519 million) and supports 137 protocols, according to DefiLlama.
Sui’s architecture is designed to handle high throughput using the Move programming language and an object-centric data model that processes independent transactions in parallel. This technical foundation, combined with its delegated proof-of-stake consensus mechanism, aims to deliver low-latency and scalable solutions, especially for financial use cases.
Looking Ahead
While the latest upgrade has stabilized the network for now, the recent outages highlight the risks of rapid software iteration in blockchain systems. Traders will be watching whether Sui can maintain uptime and restore confidence among users and investors. For SUI token holders, the next key test will be sustained price recovery, with immediate resistance levels near $1.
Image source: Shutterstock
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