ERROR: AcceptBlock: bad-witness-nonce-size, ContextualCheckBlock: invalid witness reserved value size ERROR: ProcessNewBlock: AcceptBlock FAILED (bad-witness-nonce-size, ContextualCheckBlock: invalid witness reserved value size)
You might have seen these log lines in the debug log of your listening Bitcoin Core node. I dug into the origin and found that ViaBTC's mining server broadcasts blocks without witness data..