Mr.win7

I upgrade the Unraid from 11.5 to 12.2, then to 12.3. Both of them run normally at first, and then I cannot access the webgui both ipv4 and ipv6. And web page from docker service can be accessed from ipv4 only. ssh is worked from ipv4. I read the nginx log and syslog. Nginx log shows that cannot bind to [::1], so nginx won't start. From syslog I cannot find more info about the reason why ipv6 disappear but we can see after a time, many service cannot get the ipv6 interface, like ntpd. In my home network, I configure the gateway with SLAAC. other devices work perfectly. I cannot get diagnostic from command line since it will stuck for a long time and nothing happens. Restart cannot solve the problem.