On June 14, according to mempool data, miners mined an empty block at Bitcoin height 847904 (that is, the block only contains a block reward Coinbase transaction), which is only 29 seconds away from the previous block height. Miners pack empty blocks for economic reasons, which is the smartest choice for miners. In order to make the most of this time for mining and avoid conflicts with the transactions packaged in the parent block, miners cannot fill blocks with transactions, which means that miners can only try to empty blocks.