Arbitrum Sepolia network experiences block progression stall

The Arbitrum Sepolia testnet faced a significant disruption starting March 23, 2026, when block production stalled, causing the network to halt at block 252,909,123. This issue was simultaneously reported by major node infrastructure providers Alchemy and QuickNode, who both initiated investigations and coordinated closely with the Arbitrum Foundation to resolve the problem. By early March 24, a fix had been deployed, and the network status was under active monitoring to ensure stable block progression resumed.