Sui Foundation said three mainnet halts on Thursday and Friday were caused by two separate bugs introduced in the v1.72 upgrade. The first two halts were tied to a gas-charging bug exposed by the “address balances” feature, while a rushed interim fix carried a known low-probability halt risk that later triggered another halt.

The third halt occurred when validators restarted to install the fix and hit a latent bug in how the network preserves randomness settings. Sui said the bugs have been fixed, no user funds were at risk, no settled transactions were reverted, and it has built a mechanism to force-close a stalled epoch.