Also hit here on a near-vanilla 18.04 install; snap docker auto-updated and fell down, and stayed down until manually reloaded.
$ snap changes ID Status Spawn Ready Summary 10 Done yesterday at 23:06 EST yesterday at 23:06 EST Auto-refresh snap "docker"
Also hit here on a near-vanilla 18.04 install; snap docker auto-updated and fell down, and stayed down until manually reloaded.
$ snap changes
ID Status Spawn Ready Summary
10 Done yesterday at 23:06 EST yesterday at 23:06 EST Auto-refresh snap "docker"