Comment 3 for bug 1841137

That's interesting; I had one such loop device (for an old revision of core that was no longer present in the system) on my 18.04 test box. I played a bit with this on 19.04, installed and removed a bunch of snaps, but couldn't reproduce the problem with snapd 2.40 on 19.04, apparently there are some factors that make it happen over longer periods of time.