Odaily Planet Daily News ZKsync issued a reminder on the X platform that during the protocol upgrade v26, there was a temporary problem with the backward compatibility of the Mailbox contract, which would affect L1 → L2 transactions. L1 → L2 transactions were originally handled by the Mailbox contract, but during the v26 upgrade, because the bridge and L2 were in different transition stages, backward compatibility did not work temporarily.
It may take 1.5-2 weeks to solve this problem, so users are advised to use "requestL2TransactionDirect requestL2TransactionTwoBridges" on BridgeHub instead of Mailbox, and it is recommended to migrate to BridgeHub to avoid the Mailbox contract being deprecated in the future.