Sui’s Mainnet: When Upgrades Go Sideways and Bugs Party Hard

So, Sui (SUI) Mainnet decided to take a little vacation-three times in two days. Why? Oh, just some bugs having a rave in the 1.72 software release. Classic.

Apparently, the network threw its hands up on May 28 and 29, 2026, because, you know, why not? Validators had to play babysitter while the system took a nap.

What Did the 1.72 Upgrade Break? Everything, Apparently.

The first outage started at 7 am PT on Thursday and lasted until 1:30 pm PT. Because who doesn’t love a mid-morning meltdown? The 1.72 release introduced this genius idea of paying transaction fees with address balances. Spoiler: it backfired.

Turns out, if two transactions try to spend from the same address balance simultaneously, one gets canceled. But the network, being the drama queen it is, still tries to debit the fee. Negative balance? System crash. Smooth move, Sui.

Following last week’s outages related to the 1.72 release, the Sui Core Team has completed an investigation and incident review, detailing what happened and the steps taken by validators to restart the network.

– Sui (@SuiNetwork) May 31, 2026

Validators slapped on a bandaid fix to get things running, but surprise! It had a known edge case. And guess what? That edge case showed up Friday morning at 5 am PT. A different error code decided to overwrite the original cancellation reason, bypassing the guard. Second halt. Party time!

By 8:30 am PT, the team deployed a more complete fix. Because, you know, third time’s the charm.

A Hidden Bug Crashed the Party at Epoch Change

The third outage, from 1:30 pm to 7:20 pm PT on Friday, was a whole new level of chaos. Every time Sui moves into a new epoch, validators run a setup process. Sounds simple, right? Wrong. Not enough validators showed up for the party, so the process got disabled. But here’s the kicker: that outcome wasn’t saved to disk. So, when validators restarted, they were like, “Wait, what party?” End-of-epoch logic stalled, and the network halted. Again.

Throughout this circus, the Sui Core Team assured everyone that no user funds were at risk. The SUI token price? Hanging around $0.88, down 2.57% in the past 24 hours. Market cap? $3.5 billion. Rank? 32. Yawn.

Now, the team’s got a to-do list: strengthen end-of-epoch resilience, refactor gas charging logic (because who doesn’t love jargon?), and build failure containment. Because, you know, one bad input shouldn’t crash the whole party. This comes after Sui’s $10 million security commitment post-Cetus hack. Because nothing says “we’re serious” like throwing money at the problem.

Will this week’s recovery and transparency shift sentiment? Who knows. But one thing’s for sure: Sui’s keeping things interesting. Or, you know, just keeping us entertained.

2026-06-01 15:27

What Did the 1.72 Upgrade Break? Everything, Apparently.

A Hidden Bug Crashed the Party at Epoch Change

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