Overview
- The network stopped processing user transactions in three separate halts that began Thursday and continued into Friday after the v1.72 release introduced a new address‑balances feature.
- Engineers traced the first two outages to a gas‑charging underflow that occurred when transactions mixed the new address‑balance path with legacy coin objects and a cancelled transaction still triggered a spend.
- The core team applied an interim patch on Thursday that it warned carried a low probability of causing another halt, and that known risk produced a second outage on Friday morning.
- A third stall happened during validator restarts at an epoch change when on‑chain randomness disabled itself and a latent bug failed to persist that disabled state to disk, blocking epoch closure until operators purged incorrect consensus state and coordinated a long‑term upgrade.
- Sui Foundation and validators say no user funds were lost and no finalized transactions were reverted, but SUI’s price fell roughly 8–13% with about $1.88–$2 million in liquidations, renewing questions about upgrade testing, failure containment, and validator upgrade processes.