Comment 25 for bug 1943853

To summarize, there are two issues:
1. snaps were not mounted on restart for some reason
2. this lead to loosing all auto-connected interfaces on snapd start (because snap.yaml files couldn't be read from disk)

The cause of problem #1 is unknown and we had a couple of reports about this in the past. Snaps are automatically mounted by systemd mount units on boot, so why this didn't work is unclear.

For problem #2 I've proposed a fix here: https://github.com/snapcore/snapd/pull/10814 and with it connections should be preserved on such failures.