ASUS RT-AC88U Host server local DNS don't resolve names with commands

[SystemF]

Hi! Using rt-ac88 with firmware 3.0.0.4.386_46065. Witch commands use

response from dns queries from client

and

Advertise DNS to clients

.
My point is I've custom configuration, created ccd. And want only for a specific client to use it for now testing in custom configuration tab, without success.
What I put in custom tab:

push "dhcp-option DNS 192.168.1.1"
push "dhcp-option DOMAIN RT-AC88U.router.lan"

I;ve tried tons of different scenarios. Add block-outside-dns,--register-dns no luck. The DNS server is set to the client, (static private ip), but cant resolve, router hostname. Any ideas why? Tried register dns command, its on windows 10 client.I tried using fqdn no success either. Insall wireshark to listen for packets and result:

Domain Name System (query)
Transaction ID: 0x615c
Flags: 0x0100 Standard query
0... .... .... .... = Response: Message is a query
.000 0... .... .... = Opcode: Standard query (0)
.... ..0. .... .... = Truncated: Message is not truncated
.... ...1 .... .... = Recursion desired: Do query recursively
.... .... .0.. .... = Z: reserved (0)
.... .... ...0 .... = Non-authenticated data: Unacceptable
Questions: 1