I have a Raspberry Pi running Diet Pi, and a Cubox running Armbian, both now working stably with Roonbridge. If I reboot the Pi, it temporarily disappears from the available zones, and then reappears once it reboots. If I reboot the Cubox, it disappears from the available zones, and I have to go into the settings and re-enable the zone.
Where should I start looking to troubleshoot this?