samba - Sep 2019 - samba internal dns doesn't return NXDOMAIN (bug 12464)

Hello,

I'm using samba 4 with the internal dns. I'm following the instructions 
here 
https://support.mozilla.org/en-US/kb/configuring-networks-disable-dns-over-https
to configure my dns server to return NXDOMAIN for use-application-dns.net.

If I query the server directly it returns NXDOMAIN, but if I query samba 
I get an empty answer instead (192.168.90.29 is configured as dns 
forwarder for both DCs):

luca at seis:~$ host use-application-dns.net 192.168.90.29
Using domain server:
Name: 192.168.90.29
Address: 192.168.90.29#53
Aliases:

Host use-application-dns.net not found: 3(NXDOMAIN)


luca at seis:~$ host use-application-dns.net dc1
Using domain server:
Name: dc1
Address: 192.168.90.2#53
Aliases:

luca at seis:~$ host use-application-dns.net dc2
Using domain server:
Name: dc2
Address: 192.168.90.5#53
Aliases:


dc1 is running on debian jessie/samba 4.2.14 (I know, I have to upgrade 
it, but I cannot right now)

dc2 is running on debian stretch/samba 4.5.16

I see there's a bug for that

https://bugzilla.samba.org/show_bug.cgi?id=12464

but there's no comment after 2016. Has it been solved in some later version?


Bye
-- 
Luca Olivetti
Wetron Automation Technology http://www.wetron.es/
Tel. +34 93 5883004 (Ext.3010)  Fax +34 93 5883007