Home Assistant VM guest networking broke after I installed docker on the host

Installation
1

I had a perfectly functional Home Assistant VM setup on Arch Linux using libvirt. I’m using bridged networking. The hass VM receives an IP address from my router via DHCP.

Yesterday I installed docker on the host OS for unrelated work. When I rebooted the system, the Home Assistant guest VM no longer connects properly to the network. To test my theory, I uninstalled docker from the host OS and rebooted. Now the hass VM connects correctly.

Here is the network info in the guest when functional (without docker installed on the host)

# ha net info
docker:
  address: 172.30.32.0/23
  dns: 172.30.32.3
  gateway: 172.30.32.1
  interface: hassio
host_internet: true
interfaces:
- connected: true
  enabled: true
  interface: enp0s2
  ipv4:
    address:
    - 192.168.2.9/22
    gateway: 192.168.1.254
    method: auto
    nameservers:
    - 192.168.1.254
    ready: true
  ipv6:
    address:
    - fe80::a0cf:1719:2219:b4f0/64
    gateway: null
    method: auto
    nameservers: []
    ready: false
  mac: 52:54:00:B7:95:7C
  primary: true
  type: ethernet
  vlan: null
  wifi: null
supervisor_internet: true

hass guest VM net info in non-working state (when docker is enabled on host).

# ha net info
docker:
  address: 172.30.32.0/23
  dns: 172.30.32.3
  gateway: 172.30.32.1
  interface: hassio
host_internet: null
interfaces:
- connected: true
  enabled: true
  interface: enp0s2
  ipv4:
    address: []
    gateway: null
    method: auto
    nameservers: []
    ready: false
  ipv6:
    address: []
    gateway: null
    method: auto
    nameservers: []
    ready: false
  mac: 52:54:00:B7:95:7C
  primary: false
  type: ethernet
  vlan: null
  wifi: null
supervisor_internet: false
2

This seems to be a common problem with docker conflicting with kvm/libvirt.

https://wiki.archlinux.org/title/Docker#Starting_Docker_breaks_KVM_bridged_networking