etcdctl snap created thousands of systemd scope processes

During investigation of strange CPU spikes, we've noticed that there were over 24k long running processes of etcdctl.

root@juju-2b11a1-4-lxd-10:~# systemctl status snap.etcd.etcdctl.0027c2a3-7e0f-4739-afd6-106eff7ffcb2.scope
● snap.etcd.etcdctl.0027c2a3-7e0f-4739-afd6-106eff7ffcb2.scope
   Loaded: loaded
Transient: yes
   Active: active (running) since Wed 2021-04-14 17:03:36 UTC; 1 weeks 4 days ago
    Tasks: 0
   Memory: 408.0K
      CPU: 17ms

root@juju-2b11a1-4-lxd-10:/var/lib/lxcfs/cgroup/devices/lxc/juju-2b11a1-4-lxd-10/system.slice# ls | wc -l
24178

When running below command it timed out
systemctl list-units --type=scope
Failed to list units: Connection timed out

To improve this issue, we had to manually stop them by:
for i in `ls | grep etcdctl`; do echo $i; systemctl stop $i; done

ubuntu@juju-2b11a1-6-lxd-14:~$ snap list
Name Version Rev Tracking Publisher Notes
core 16-2.49.1 10908 latest/stable canonical✓ core
etcd 3.1.10 81 3.1/stable canonical✓ -
ubuntu@juju-2b11a1-6-lxd-14:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.6 LTS
Release: 16.04
Codename: xenial

  etcd:
    charm: cs:etcd-544
    series: xenial
    os: ubuntu
    charm-origin: jujucharms
    charm-name: etcd
    charm-rev: 544
    can-upgrade-to: cs:etcd-569