Wu Shuo has learned that Ethereum L2 network Starknet released a post-mortem analysis report regarding the brief mainnet outage on Monday this week. The report states that the accident was caused by state inconsistency between the execution layer (blockifier) and the proving layer: under a specific combination of cross-function calls and rollbacks, the execution layer incorrectly recorded state writes that had been rolled back, resulting in abnormal transaction execution. The relevant transactions did not receive L1 finality confirmation. This incident triggered a chain reorganization, with approximately 18 minutes of on-chain activity being rolled back. This is the second major disruption since 2025; previously in September, a sequencer vulnerability caused an outage of over 5 hours, with approximately 1 hour of on-chain activity rolled back.