0xB10C on Nostr: ERROR: AcceptBlock: bad-witness-nonce-size… You might have seen this in the debug ...

ERROR: AcceptBlock: bad-witness-nonce-size…

You might have seen this in the debug log of your listening Bitcoin Core node. I dug into the origin and found that ViaBTC's mining server broadcasts mutated blocks without witness data:
https://b10c.me/observations/10-viabtc-blocks-without-witness-data/?n