Belkin RT3200 odhcp6c issue

Hello, hopefully someone will be able to help me.

I'm on the latest OpenWrt snapshot for this router, which is configured with PPPoE.
Currently, the system log is being spammed with the following message:

Wed Apr 13 20:19:57 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
Wed Apr 13 20:22:00 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
Wed Apr 13 20:23:58 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
Wed Apr 13 20:26:06 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
Wed Apr 13 20:28:04 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
Wed Apr 13 20:30:01 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)
Wed Apr 13 20:32:09 2022 daemon.err odhcp6c[2370]: Failed to send SOLICIT message to ff02::1:2 (Network unreachable)

I previously had to deal with a similar dnsmasq issue (visible below), which I ignored editing config dnsmasq in /etc/config/dhcp.

daemon.warn dnsmasq[1]: failed to create listening socket for fe80::XXXX:XXXX:XXXX:c083%pppoe-wan: Address not available

Could it be an IPv6 misconfiguration on the WAN interface?
Everything seems to be working properly. However, this messages are really annoying...

Thanks everyone.