LXD: ubuntu-minimal images 18.04 and 20.04 ignore cloud config

when creating containers with ubuntu-minimal repository, the 18.04 and 20.04 versions of the container completely ignores cloud_init directives supplied with the profile during the container creation and operation.

When I create a container from the ubuntu-minimal image store the cloud-init components are completely ignored by 18.04, 20.04 and 22.04 images. I have my cloud_init in a separate profile and I init the containers as follows:

lxd init ubuntu-minimal:18.04 um18test -p default -p cloud_init
lxd init ubuntu-minimal:20.04 um20test -p default -p cloud_init
lxd init ubuntu-minimal:22.04 um22test -p default -p cloud_init

The cloud_init profile has the following directives:

config:
    cloud-init.user-data: |
    #cloud-config
    locale: C.UTF-8
    timezone: Europe/Moscow
    runcmd:
      - [apt-get, -y, update]
      - [apt-get, -y, upgrade]
      - [apt, -y, autoremove]
      - [touch, /tmp/simos_was_here]
    users:
            - name: alex
              plain_text_passwd: 'foobarbaz'
              chpasswd:
                   expire: True
              ssp_pwauth: false
              shell: /bin/bash
              groups: admin, sudo
              ssh_authorized_keys:
                      - ssh-ed25519 REDACTED REDACTED
   - name: ansctl
              shell: /bin/bash
              ssh_authorized_keys:
                      - ssh-ed25519 REDACTED REDACTED
    write_files:
            - content: |
                    ansctl ALL=(ALL) NOPASSWD: ALL
              path: /etc/sudoers.d/ansctl
              owner: root:root
              permissions: '0640'
description: General settings for instances
devices: {}
name: cloud_init

The config works for 22.04 minimal and for all of the full-sized images from the "ubuntu" repository