Specifically, at this address: 1QLbz7JHiBTspS962RLKV8GndWFw

There is a great answer explaining why some characters are easier to find than others on stackexchange here: https://bitcoin.stackexchange.com/a/95828. It is to do with converting Base58 back to Base16 gives two ranges for some addresses (the easier to find ones), but only one range for the others.