I've updated the LXD snap, note that there's also a snapd issue which may be in play here as it's been known to needlessly delay boot with snaps using socket activation.
I've accepted the new snapd into cosmic now, so I think we'll want for both the lxd snap to be in stable (should be in the next couple hours) AND the new snapd to hit the release pocket, then re-test to see if we got this issue fixed.
I've updated the LXD snap, note that there's also a snapd issue which may be in play here as it's been known to needlessly delay boot with snaps using socket activation.
I've accepted the new snapd into cosmic now, so I think we'll want for both the lxd snap to be in stable (should be in the next couple hours) AND the new snapd to hit the release pocket, then re-test to see if we got this issue fixed.