CoinDesk
Sui's mainnet went down three separate times across May 28 and 29 after a new address-balance feature shipped in the v1.72 release exposed an edge case in the network's gas-charging logic. The Sui Foundation published a post-mortem Sunday tracing all three outages to cascading interactions between the new feature, gas handling, and the network's on-chain randomness protocol.
The first outage lasted nearly seven hours after validators crashed with an underflow error when a transaction was canceled for insufficient funds but the gas-charging routine still attempted to spend those same funds. The core team deployed an interim fix it acknowledged carried a known residual risk — a risk that materialized the following morning when a masked variant of the same bug bypassed the patch and triggered a second halt.
The third outage was a knock-on: when validators restarted to install the more robust fix, participation in the on-chain randomness protocol fell below the required threshold. A latent bug then failed to persist the disabled state to disk, leaving validators unaware randomness had been turned off. The next epoch change stalled for close to six hours as randomness-dependent transactions queued up.
No user funds were lost and no committed transactions were reversed, but SUI fell roughly 19% on the week to around $0.90. The incidents mark Sui's third major reliability failure since its 2023 mainnet launch.
CoinTelegraph
TheBlock