All IPv6 hosts registered in DNS as host.home.arpa instead of DHCP6 range domain

[RutgerDiehard]

I've spent a lot of time following the docs to set up ISP IPv6 PD + dnsmasq + DHCP6 which has been successful apart from one issue. All IPv6 hosts are registered in dnsmasq as host.home.arpa rather than the domain name that's listed in the DHCP6 range in dnsmasq.

I know there's been a lot of dicussions on dnsmasq recently and some fixes have been created for other issues. Is this a known issue or is it something new?

I can provide further information on setup if required.