I cannot resolve IPv6 hostname via FS console. Are it is bug?

[root@localhost6 ~]# nslookup -type=aaaa ipv6.cybernode.com
Server: ::1
Address: ::1#53

Non-authoritative answer:
ipv6.cybernode.com has AAAA address 2001:470:1:1b9::31

[root@localhost6 ~]# fs_cli -x "host_lookup ipv6.cybernode.com"
-ERR no reply

[root@localhost6 ~]#