Reproduced on kusama validator. Confirmed at the moment for litep2p, libp2p pending investigation:
ERROR tokio-runtime-worker sync: received notification from 12D3KooWMb8BgRtEXdG2PGK5mve2nYX2uzAYJ6VhnX9i6hAod4mV who had been earlier refused by `SyncingEngine`
Reproduced on kusama validator. Confirmed at the moment for litep2p, libp2p pending investigation:
Version deployed: version 1.16.1-ca8beaed148
https://github.com/paritytech/polkadot-sdk/blob/3906c578c96d97a8a099a4bdac4685acbe375a7c/substrate/client/network/sync/src/engine.rs#L747-L753
Grafana link: https://grafana.teleport.parity.io/goto/msBvOdnNg?orgId=1
cc @paritytech/sdk-node