Comment 3 for bug 1809729

I suspect this is caused by `udevadm trigger` and `udevadm settle` that snapd invokes, for some snaps, depending on how they are made, when they are removed.

There are multiple other bugs related to various issues (including desktop crashing or minor annoyances) related to udev. I've added a tag to this bug to ease discovery of such bugs for other developers.