Polygon's Ithaca hard fork is scheduled to go live on the mainnet at block height 50,185,000, expected around 22:00 Beijing time on July 29. The upgrade, already deployed on the Amoy testnet, aims to enhance payment reliability by introducing automatic failover to maintain transaction flow during block producer stalls. It also includes new mechanisms to filter destabilizing transactions and improve node operator visibility. Node operators are urged to upgrade promptly to ensure compatibility and network security.