According to the news on January 12, according to mempool data, miners dug out a half-empty block at Bitcoin height 878889, which is only 87 seconds away from the previous block height. Mempool founder @mononautical posted on this that all transactions in this unfilled f2pool block were broadcast in the previous minute or so, indicating that the block maker node did not have the mempool.dat file (re- ), or the template has not yet started loading when it is requested. The last time a similar event occurred was at block height 855363, about five months ago.