The latest version of the lxd snap still has the same problem.
~# snap info lxd
name:      lxd
summary:   System container and virtual machine manager
publisher: Canonical✓
store-url: https://snapcraft.io/lxd
contact:   https://github.com/lxc/lxd/issues
license:   unset
description: |
  **LXD is a system container and virtual machine manager**

  With LXD you can run hundreds of containers of a variety of Linux
  distributions, apply resource limits, pass in directories, USB devices
  or GPUs and setup any network and storage you want.

  LXD containers are lightweight, secure by default and a great
  alternative to running Linux virtual machines.

  If you want to run other Operating Systems or special Linux workloads,
  you can use LXD virtual machines instead

  **Run any Linux distribution you want**

  Pre-made images are available for Ubuntu, Alpine Linux, ArchLinux,
  CentOS, Debian, Fedora, Gentoo, OpenSUSE and more.

  A full list of available images can be found here:
  https://images.linuxcontainers.org

  Can't find the distribution you want? It's easy to make your own images
  too, either using our `distrobuilder` tool or by assembling your own image
  tarball by hand.


  **Containers and VMs at scale**

  LXD is network aware and all interactions go through a simple REST API,
  making it possible to remotely interact with instances on remote
  systems, copying and moving them as you wish.

  Want to go big? LXD also has built-in clustering support,
  letting you turn dozens of servers into one big LXD server.


  **Configuration options**

  Supported options for the LXD snap (`snap set lxd KEY=VALUE`):
     - ceph.builtin: Use snap-specific Ceph configuration [default=false]
     - ceph.external: Use the system's ceph tools (ignores ceph.builtin)
     [default=false]
     - criu.enable: Enable experimental live-migration support
     [default=false]
     - daemon.debug: Increase logging to debug level [default=false]
     - daemon.group: Set group of users that can interact with LXD
     [default=lxd]
     - daemon.preseed: Pass a YAML configuration to `lxd init` on initial
     start
     - daemon.syslog: Send LXD log events to syslog [default=false]
     - lvm.external: Use the system's LVM tools [default=false]
     - lxcfs.pidfd: Start per-container process tracking [default=false]
     - lxcfs.loadavg: Start tracking per-container load average
     [default=false]
     - lxcfs.cfs: Consider CPU shares for CPU usage [default=false]
     - openvswitch.builtin: Run a snap-specific OVS daemon [default=false]
     - shiftfs.enable: Enable shiftfs support [default=auto]

  Documentation: https://linuxcontainers.org/lxd/docs/master/
commands:
  - lxd.benchmark
  - lxd.buginfo
  - lxd.check-kernel
  - lxd.lxc
  - lxd.lxc-to-lxd
  - lxd
  - lxd.migrate
services:
  lxd.activate: oneshot, enabled, inactive
  lxd.daemon:   simple, enabled, active
snap-id:      J60k4JY0HppjwOjW8dZdYc8obXKxujRu
tracking:     latest/edge
refresh-date: today at 12:42 UTC
channels:
  latest/stable:    4.13        2021-04-28 (20211) 72MB -
  latest/candidate: 4.13        2021-04-27 (20211) 72MB -
  latest/beta:      ↑
  latest/edge:      git-ee6eda2 2021-04-28 (20221) 67MB -
  4.13/stable:      4.13        2021-04-28 (20211) 72MB -
  4.13/candidate:   4.13        2021-04-27 (20211) 72MB -
  4.13/beta:        ↑
  4.13/edge:        ↑
  4.12/stable:      4.12        2021-03-17 (19823) 72MB -
  4.12/candidate:   4.12        2021-03-27 (19932) 72MB -
  4.12/beta:        ↑
  4.12/edge:        ↑
  4.0/stable:       4.0.5       2021-03-16 (19647) 73MB -
  4.0/candidate:    4.0.5       2021-03-26 (19930) 70MB -
  4.0/beta:         ↑
  4.0/edge:         git-bebf52b 2021-04-26 (20199) 65MB -
  3.0/stable:       3.0.4       2019-10-10 (11348) 55MB -
  3.0/candidate:    3.0.4       2019-10-10 (11348) 55MB -
  3.0/beta:         ↑
  3.0/edge:         git-81b81b9 2019-10-10 (11362) 55MB -
  2.0/stable:       2.0.12      2020-08-18 (16879) 38MB -
  2.0/candidate:    2.0.12      2021-03-22 (19859) 39MB -
  2.0/beta:         ↑
  2.0/edge:         git-82c7d62 2021-03-22 (19857) 39MB -
installed:          git-ee6eda2            (20221) 67MB -
~# curl -G --unix-socket "/var/snap/lxd/common/lxd/unix.socket" "lxd/1.0/resources" 2>/dev/null | jq >/tmp/t