Summary

On the Hoodi testnet at slot 1453184 Nethermind failed and participation on the network dropped from the high 90% level to the mid 80% level.

Nethermind quickly identified the root cause and released a fixed client version which requires a resync for those that experienced the issue.

Recommended actions

Follow Nethermind in Discord and announcements on fixed client versions and steps to implement.

Latest updates

06 Oct 2025 15:18 UTC

All operators should install the update, even if on mainnet. After updating the client, a resync is only necessary if you experienced the error.

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06 Oct 2025 13:40 UTC

Nethermind releases an update that fixes the issue, which requires a resync after updating:

https://github.com/NethermindEth/nethermind/releases/tag/1.34.1

06 Oct 2025 7:40 UTC