Cardano has just come through one of the most severe technical incidents in its history – a 14-hour chain split that founder Charles Hoskinson insists was “serious, but not existential.” In a late-November livestream, he walked viewers through Pi Lanningham’s “Poison Piggy – After Action Report,” a detailed post-mortem on what happened on November 21, 2025, and what it means for Cardano’s long-held “no downtime” narrative.

Inside Cardano’s 14-Hour Pig-Chain Meltdown

According to Lanningham, a serialization bug in Cardano’s node implementation created the conditions for a unidirectional soft fork. The issue first surfaced on November 20 on the preview testnet, when a malformed delegation certificate was accepted by some nodes and rejected by others. Older nodes correctly rejected the over

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