The LXD 5.21/stable channel is being updated to include interim fixes since the LXD 5.21.4 LTS interim snap release 5.21.4-7b6bd68.
It will become available progressively as snap version: 5.21.4-9eb1368 in the 5.21/stable channel (it is available now in the 5.21/candidate snap channel).
Fixes:
- Fix to support latest version of Docker (
runc) inside LXD containers Container: Don't bother with sys/proc protections when nesting enabled (from Incus) by tomponline · Pull Request #16927 · canonical/lxd · GitHub