Mosquitto broker addon not listening on websocket ports

Configuration
1

This was working previously, but now for some reason I can’t get mqtt websockets to work. This is included in the Mosquitto log:

2023-01-14 11:33:38: mosquitto version 2.0.11 starting
2023-01-14 11:33:38: Config loaded from /etc/mosquitto/mosquitto.conf.
2023-01-14 11:33:38: Loading plugin: /usr/share/mosquitto/go-auth.so
2023-01-14 11:33:38:  ├── Username/password checking enabled.
2023-01-14 11:33:38:  ├── TLS-PSK checking enabled.
2023-01-14 11:33:38:  └── Extended authentication not enabled.
2023-01-14 11:33:38: Opening ipv4 listen socket on port 1883.
2023-01-14 11:33:38: Opening ipv6 listen socket on port 1883.
2023-01-14 11:33:38: Warning: Address family not supported by protocol
2023-01-14 11:33:38: Opening websockets listen socket on port 1884.
2023-01-14 11:33:38: Opening ipv4 listen socket on port 8883.
2023-01-14 11:33:38: Opening ipv6 listen socket on port 8883.
2023-01-14 11:33:38: Warning: Address family not supported by protocol
2023-01-14 11:33:38: Opening websockets listen socket on port 8884.
2023-01-14 11:33:38: mosquitto version 2.0.11 running

Which looks good to me, except for the ipv6 warnings. But I can’t connect with any client I’ve tried. docker -ps shows:

ad75ef341f2e   homeassistant/aarch64-addon-mosquitto:6.1.3                     "/init"               41 minutes ago   Up 41 minutes   0.0.0.0:1883-1884->1883-1884/tcp, 0.0.0.0:8883-8884->8883-8884/tcp   addon_core_mosquitto

Which looks like it’s opened the websocket ports. However, I installed net-tools in the container, and netstat -lnp shows:

tcp        0      0 0.0.0.0:8883            0.0.0.0:*               LISTEN      152/mosquitto
tcp        0      0 127.0.0.1:80            0.0.0.0:*               LISTEN      153/nginx: master p
tcp        0      0 0.0.0.0:1883            0.0.0.0:*               LISTEN      152/mosquitto
tcp        0      0 127.0.0.11:37319        0.0.0.0:*               LISTEN      -
udp        0      0 127.0.0.11:50230        0.0.0.0:*                           -

Causing me to conclude it is not listening on the websocket ports.
I really need help on how to proceed with troubleshooting or what might be wrong in the configuration. Thank you!

3

I’ve found that adding this line underneath each listener in mosquitto.conf solves the problem:

socket_domain ipv4

So now the question is how can I do that in a persistent way? Any changes made to mosquitto.conf in the container don’t survive a restart of the add-on.