Suggestion: DHCPv6 Server: Disable early DNS registration on interfaces that track WAN
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Early DNS Registration seems to trigger this. If a static mapping only contains an interface identifier instead of a whole address, which is usual on interfaces that track WAN, this will be registered but will not serve any purpose. So maybe the Early DNS Registration policy can be disabled by default on such interface. Or better be disabled by default in the static mapping itself if an IPv6-address with leading "::" is used.
