Question: Is lossless optimization actually lossless?

[Igor Adamenko]

It's a bit awkward, but when I run --lossless second time, I get JPEG compressed even more:

First time:

✔ 1.jpg
   54.421 KB → 36.374 KB. Ratio: 33%

Second time:

✔ 1.jpg
   36.374 KB → 31.389 KB. Ratio: 14%

Does it mean that lossless optimization is actually lossy and it creates noisy JPEGs when you run it several times?