Bitcoin mines a half-empty block at height 855363

According to mempool data, a miner has mined a half-empty block at Bitcoin height 855363, with only a 75-second time interval from the previous block height.Mempool founder @mononautical posted on social media that "all transactions in this half-empty block were broadcasted in the previous minute or so."Therefore, this block may have been mined by a brand new node, unexpectedly entering production without synchronizing the mempool.