Fri Dec 17 17:36:53 2021 daemon.err odhcpd[1966]: Failed to send to ff02::1%lan@br-lan (Permission denied)
Fri Dec 17 17:37:09 2021 daemon.err odhcpd[1966]: Failed to send to ff02::1%lan@br-lan (Permission denied)
Fri Dec 17 17:37:25 2021 daemon.err odhcpd[1966]: Failed to send to ff02::1%lan@br-lan (Permission denied)
Update: I disabled odhcpd-ipv6only and I think this solved the issue!