Hi This is caused by the fact that the apparmor profile for snap-confine was never actually tested or expected to work on Debian.
I think we should remove the profile when working on Debian until we come to the point where snapd is fully tested on Debian or when all of apparmor patches to the kernel are released upstream and available in Debian. If there is agreement to do this I will remove the snap-confine apparmor profile.
