@Valerio found this out first, but never received an answer. Today I found it out, too. But this is present since 2019 (or even longer).   I would say it's a bug, as: it prevents HDD/SSD spindown/sleep (depending on the location of docker.img) it wears out the SSD in the long run (if docker.img is located here) - see this bug, too. it prevents reaching CPU's deep sleep states   What happens: /var/lib/docker/containers/*/hostconfig.json is updat