Hi,
The LAN interface is loosing its IPV6 IP intermittently. If I go on the LAN interface form and just click save and apply, it comes back.
The WAN is configured with PPPoE/DHCPv6 and LAN with "Track interface".
I think you are affected by this issue: https://github.com/opnsense/core/issues/4338
Thanks. Will try to restart radvd next time it happens and now following the issue.