pfSense

from https://www.freebsd.org/cgi/man.cgi?query=dhcpd.conf&apropos=0&sektion=0&manpath=FreeBSD+12.2-RELEASE+and+Ports&arch=default&format=html:

       Note that the zone declarations have to correspond to authority records
       in your name server - in    the above example, there must be an SOA    record
       for "example.org." and for "17.10.10.in-addr.arpa.".  For  example,  if
       there  were  a  subdomain  "foo.example.org"  with no separate SOA, you
       could not write a zone declaration for "foo.example.org."  Also keep in
       mind  that  zone     names in your DHCP configuration should end in    a ".";
       this is the preferred syntax.  If you do    not end    your zone  name     in  a
       ".",  the  DHCP    server will figure it out.  Also note that in the DHCP
       configuration, zone names are not encapsulated in  quotes  where     there
       are in the DNS configuration.

fix:
https://gitlab.netgate.com/pfSense/pfSense/-/merge_requests/90