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Sui’s 1.72 bugs caused three outages before foundation rolled out major fix

Sui announced it has finished a significant upgrade to address recent issues that caused three disruptions to its network over two days. The team says they’ve resolved the bugs that caused these outages.

Summary

  • Sui said 1.72 release bugs caused two outages, while an interim fix triggered another halt.
  • Validators applied a major upgrade and said known gas-charging and randomness-state bugs were fully addressed.
  • The SUI token fell near 89 cents as repeated network halts drew fresh reliability questions.

According to the Sui Foundation, the network experienced two outages: one on May 28th, lasting from approximately 7:00 a.m. to 1:30 p.m. Pacific Time, and another on May 29th, from around 5:00 a.m. to 8:30 a.m. Pacific Time.

Another disruption started around 1:30 PM Pacific Time on Friday and lasted until about 7:20 PM PT. Sui confirmed that user funds were safe throughout the outages, and that no completed transactions were undone when the network came back online.

1.72 bugs and interim fix caused halts

Sui identified the initial two service disruptions as being caused by software errors in its version 1.72 release. This update included a new feature allowing users to manage and use funds without traditional coin objects.

Read here:

— Sui (@SuiNetwork) May 31, 2026

A recent issue caused problems with gas fees during transactions when users didn’t have enough funds. Sui explained that the system sometimes deducted fees *before* fully processing a transaction, which led to temporary negative balances and caused some network validators to fail.

The organization initially restored network service with a temporary solution while their main team developed a more permanent fix. However, that temporary fix contained a minor, but possible, problem which ultimately caused another outage on Friday morning.

A third disruption occurred during the regularly scheduled system update. Sui reported that a hidden flaw caused issues with validators maintaining random data after restarting, even with the fix applied Friday morning.

Related coverage adds market context

As crypto.news reported before, Sui experienced a six-hour disruption on January 14, 2026, due to a bug that caused disagreements among validators. The previous report confirmed that users’ funds were secure throughout the outage.

As an analyst, I’ve been following Sui closely. They experienced a significant network issue back in November 2024, with validators getting caught in a crash loop. More recently, in April, crypto.news reported that the CME Group intends to list futures contracts for both AVAX and SUI, which should open up access to institutional investors through a regulated market.

SUI price remains under pressure

As a researcher tracking SUI, I observed that its price dipped after the recent outages. Before the first disruption, it was trading around $0.99, but following the issues, it settled near $0.88. So, the network problems definitely had a negative impact on its value.

Sui continues to be a hub for decentralized finance (DeFi), with hundreds of millions of dollars currently locked in its applications, according to data from DefiLlama. After experiencing some disruptions, Sui reports that its validators have fixed the issues causing high fees and unpredictable results, and the network is now operating normally.

The organization also identified improvements in managing errors, handling data processing completion, and using AI to help with problem-solving as priorities for future development.

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2026-06-01 09:44