Even my WAN(PPPOE) interface has already got a IPv6 address and a prefix, this log still comes out.
2026-03-24T14:49:42 Notice dhcp6c Sending Solicit on pppoe0
2026-03-24T14:23:50 Notice dhcp6c Sending Solicit on pppoe0
2026-03-24T14:23:44 Notice dhcp6c Sending Solicit on pppoe0
2026-03-24T14:21:34 Notice dhcp6c Sending Solicit on pppoe0
2026-03-24T14:12:18 Notice dhcp6c Sending Solicit on pppoe0
2026-03-24T14:11:55 Notice dhcp6c Sending Solicit on pppoe0
2026-03-24T13:46:21 Notice dhcp6c Sending Solicit on pppoe0
There have been a lot of similar topics lately about dhcp6c issues and new features and improvements so maybe you should have a look in those and see if any of the issues mentioned there apply to your situation too ? :)
One thing to note here is that the default logging in 26.1 was changed to info level so we only have a checkbox for debug mode and the fact that it makes it easier to see problems initially as the default log level really didn't log anything it did or issues it encountered.
Cheers,
Franco