SteamOS resets /etc when leaving desktop mode

[konomikitten]

Your system information

• Steam client version: 1773426488
• SteamOS version: 3.7.20
• OS Build: 20260108.1
• Opted into Steam client beta?: No
• Opted into SteamOS beta?: No
• Have you checked for updates in Settings > System?: Yes

Please describe your issue in as much detail as possible:

I expect the contents of /etc/ not to be reset every time I leave desktop mode.

Steps for reproducing this issue:

1. Open Konsole and run sudo systemctl enable avahi-daemon.service
2. Switch to gaming mode or restart etc
3. Open Konsole and run sudo systemctl status avahi-daemon.service

SteamOS seems to be resetting /etc/ the second you leave desktop mode in any way. I've tried creating /etc/atomic-update.conf.d/avahi-daemon-keep-list.conf which I added the following lines to:

/etc/systemd/system/dbus-org.freedesktop.Avahi.service
/etc/systemd/system/multi-user.target.wants/avahi-daemon.service
/etc/systemd/system/sockets.target.wants/avahi-daemon.socket

I'm pretty sure this is just for keeping the contents of /etc/ between updates not leaving desktop mode. But I thought I'd try this anyway.

Why is SteamOS resetting /etc/ now?