Dynamic IPv6 DNS server from ISP are being hand out into LAN with advertise-dns=no

I am using a Chateau 5G ax r17, which connects with 4G/5G to my ISP. My ISP hands out IPv4 and IPv6 DNS server, which are also being found.

IPv6 ND is configured with advertise-dns=no, but the clients still get those public DNS servers send, why is that? Did I missed something?

Using latest ROS 7.24.4.

/ip/dns/print
servers:
dynamic-servers: 10.74.210.210
10.74.210.211
2a01:598:7ff:0:10:74:210:210
2a01:598:7ff:0:10:74:210:211
use-doh-server:
verify-doh-cert: no
doh-max-server-connections: 5
doh-max-concurrent-queries: 50
doh-timeout: 5s
allow-remote-requests: yes
max-udp-packet-size: 4096
query-server-timeout: 2s
query-total-timeout: 10s
max-concurrent-queries: 100
max-concurrent-tcp-sessions: 20
cache-size: 2048KiB
cache-max-ttl: 1w
address-list-extra-time: 0s
vrf: main
mdns-repeat-ifaces:
cache-used: 322KiB

/ipv6/nd/print
Flags: * - DEFAULT
0 * interface=bridge1 ra-interval=3m20s-10m ra-delay=3s mtu=unspecified reachable-time=unspecified retransmit-interval=unspecified ra-lifetime=30m
ra-preference=medium hop-limit=unspecified advertise-mac-address=yes advertise-dns=no managed-address-configuration=yes other-configuration=no

ipconfig /all

[..]

DNS-Server . . . . . . . . . . . : 2a01:598:7ff:0:10:74:210:210
2a01:598:7ff:0:10:74:210:211
192.168.62.1