According to mempool data, an empty block was mined at Bitcoin height 833061, containing only one transaction containing the block reward Coinbase.
Note: When a new block is discovered, the mining pool sends miners a block template without transactions so that they can start searching for the next block as quickly as possible. They then send a block template full of transactions, but the full block template is a larger data transfer and takes slightly longer to reach miners. During this time (usually no more than 1-2 seconds), miners sometimes get lucky and find new blocks using empty block templates.