Epoch Transition Snag Brings Sui Network to Grinding Halt for Third Time in Two-Day Span

Key facts Sui mainnet experienced three separate transaction processing failures across 28 and 29 May 2026, all stemming from a gas-charging logic bug introduced in the v1.72 protocol upgrade, compounded by a conflict with the Address Balances feature. The first halt began on 28 May at 07:15 PDT and lasted approximately six hours before validators deployed an initial patch and the network resumed. A second disruption followed on 29 May when validators upgraded to that same patch, pausing block production for approximately 3.5 hours. Sui Network confirmed the first patch carried a known low-probability failure condition — a calculated risk that the recovery process ultimately triggered.

"Sui mainnet is back online and transactions are flowing normally.", 30 May 2026.

— Sui Network (@SuiNetwork), official account

Third halt strikes during epoch transition as the long-term fix rolls outThe third disruption began at 13:57 PDT on 29 May during an epoch transition, while validators were simultaneously rolling out the long-term fix. Sui Network stated that a bug in the randomness initialisation process at the start of the epoch — combined with an error state retained across validator restarts — prevented the network from completing the transition to the next epoch. During the approximately 5.5-hour window, validators processed only system transactions; user transactions including token transfers, swaps, and decentralised finance (DeFi) deposits and withdrawals could not be confirmed. The network advanced to epoch 1143 at 19:32 PDT before resuming normal operations, though validator participation remained degraded for a period. Sui Network has not yet published a post-mortem; one is expected in the coming days.

— Sui Network (@SuiNetwork), official account

SUI falls 15.6% over seven days as TVL and stablecoin activity stallsAt the time of the incidents, Sui carried approximately $527.91M in total value locked and $459.25M in stablecoin market capitalisation, according to DeFiLlama data cited in incident reporting. All on-chain DeFi activity — liquidity provision, lending, stablecoin transfers — was interrupted while the network processed only system transactions. SUI traded at $0.878 on 1 June 2026, down 15.62% over the preceding seven days (CoinPaprika, 1 June 2026), reflecting sustained sell pressure from the outage period. The series of halts has drawn attention to Sui's upgrade pipeline and validator coordination process, with the development team yet to confirm whether release procedures will change ahead of future upgrades. Third halt strikes during epoch transition as the long-term fix rolls outThe third disruption began at 13:57 PDT on 29 May during an epoch transition, while validators were simultaneously rolling out the long-term fix. Sui Network stated that a bug in the randomness initialisation process at the start of the epoch — combined with an error state retained across validator restarts — prevented the network from completing the transition to the next epoch. During the approximately 5.5-hour window, validators processed only system transactions; user transactions including token transfers, swaps, and decentralised finance (DeFi) deposits and withdrawals could not be confirmed. The network advanced to epoch 1143 at 19:32 PDT before resuming normal operations, though validator participation remained degraded for a period. Sui Network has not yet published a post-mortem; one is expected in the coming days.

SUI falls 15.6% over seven days as TVL and stablecoin activity stallsAt the time of the incidents, Sui carried approximately $527.91M in total value locked and $459.25M in stablecoin market capitalisation, according to DeFiLlama data cited in incident reporting. All on-chain DeFi activity — liquidity provision, lending, stablecoin transfers — was interrupted while the network processed only system transactions. SUI traded at $0.878 on 1 June 2026, down 15.62% over the preceding seven days (CoinPaprika, 1 June 2026), reflecting sustained sell pressure from the outage period. The series of halts has drawn attention to Sui's upgrade pipeline and validator coordination process, with the development team yet to confirm whether release procedures will change ahead of future upgrades. The third disruption began at 13:57 PDT on 29 May during an epoch transition, while validators were simultaneously rolling out the long-term fix. Sui Network stated that a bug in the randomness initialisation process at the start of the epoch — combined with an error state retained across validator restarts — prevented the network from completing the transition to the next epoch. During the approximately 5.5-hour window, validators processed only system transactions; user transactions including token transfers, swaps, and decentralised finance (DeFi) deposits and withdrawals could not be confirmed. The network advanced to epoch 1143 at 19:32 PDT before resuming normal operations, though validator participation remained degraded for a period. Sui Network has not yet published a post-mortem; one is expected in the coming days.

SUI falls 15.6% over seven days as TVL and stablecoin activity stallsAt the time of the incidents, Sui carried approximately $527.91M in total value locked and $459.25M in stablecoin market capitalisation, according to DeFiLlama data cited in incident reporting. All on-chain DeFi activity — liquidity provision, lending, stablecoin transfers — was interrupted while the network processed only system transactions. SUI traded at $0.878 on 1 June 2026, down 15.62% over the preceding seven days (CoinPaprika, 1 June 2026), reflecting sustained sell pressure from the outage period. The series of halts has drawn attention to Sui's upgrade pipeline and validator coordination process, with the development team yet to confirm whether release procedures will change ahead of future upgrades. At the time of the incidents, Sui carried approximately $527.91M in total value locked and $459.25M in stablecoin market capitalisation, according to DeFiLlama data cited in incident reporting. All on-chain DeFi activity — liquidity provision, lending, stablecoin transfers — was interrupted while the network processed only system transactions. SUI traded at $0.878 on 1 June 2026, down 15.62% over the preceding seven days (CoinPaprika, 1 June 2026), reflecting sustained sell pressure from the outage period. The series of halts has drawn attention to Sui's upgrade pipeline and validator coordination process, with the development team yet to confirm whether release procedures will change ahead of future upgrades. Cryptocurrencies are highly volatile and involve significant risk. You may lose part or all of your investment. All information on Coinpaprika is provided for informational purposes only and does not constitute financial or investment advice. Always conduct your own research (DYOR) and consult a qualified financial advisor before making investment decisions. Coinpaprika is not liable for any losses resulting from the use of this information.