Hello,
I’ve been using docker for 4 years inside an Ubuntu 14.04 vagrant VM (windows host) with devicemapper fs without^^ problems.
I recently switched to linux mint 19.3 running docker (19.03.11) on the host with overlay2.
It’s been twice that after a reboot, I lost all my docker images, only the running ones were not deleted.
I confirmed that the images layers were well gone by checking in the docker/data/overlay2.
Linux mint frequently hangs on shutdown so I don’t know if that may be the issue.
Apart from that, I don’t do anything off the chart expect having change the path where docker store its data with a daemon.json file: “data-root”: “/home/myuser/.docker/data”
Let me know if I can provide more info.