The Base mainnet will undergo the Optimism Superchain U16A upgrade on October 8th

Base Build announced on the X platform that the Base mainnet will undergo an Optimism Hyperchain U16A upgrade from 1:00 AM to 3:00 AM Beijing Time on October 8th. This will temporarily disable pending withdrawals from the Base mainnet to Ethereum L1. Deposits and on-chain activities will continue as normal. Users must ensure all pending withdrawals are completed before 1:00 AM on October 8th.