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.

Quotes that support claims

Both issues resulted from misconfigurations with the test rather than with Pectra itself

The Ethereum Foundation brushed off the technical issues surrounding the failure, with core developer Tim Beiko calling the problems “quite trivial and easily patched.”

The Holesky testnet recently experienced issues due to incorrect deposit contract addresses, leading to chain splits and delayed finality

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