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Ethereum validator participation dips after Fusaka upgrade bug

December 05, 2025, 8:53 AM
The Ethereum network experienced a temporary drop in validator participation immediately following its Fusaka upgrade due to a bug in the Prysm consensus layer client, Cointelegraph reported. The bug was found to have occurred while Prysm v7.0.0 was processing old validator attestations. According to the Beaconchain explorer beaconcha.in, at epoch 411448, network synchronization participation fell to 75% and voting participation dropped to 74%. The network has since recovered, with voting participation at 99% and synchronization at 97% by epoch 411712. At the time of the incident, approximately 22.71% of validators were using the Prysm client, a share that has since decreased to 18%.

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