Both issues resulted from misconfigurations with the test rather than with Pectra itself
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Ethereum
Ethereum Foundation
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Ethereum's Second Buggy 'Pectra' Test Could Lead to a Delayed Upgrade
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The Ethereum Foundation stated that Sepolia’s issue stemmed from a testnet-specific misconfiguration, not a flaw in Pectra. A similar problem in February’s Holesky test caused a chain split due to validator misconfiguration.
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