I run

    rpm -qa | grep -i ddclient
        ddclient-3.9.0-lp150.65.1.noarch

My config sets ONLY dyndns checks

    egrep "dnspark|loopia|dyndns" /etc/ddclient.conf
        server=members.dyndns.org
        example.dyndns-server.com

When I check manually, it's NOT just checking dyndns, but ALSO other servers,

    ddclient -query -file /etc/ddclient.conf
        use=if, if=enp1s0 address is AA.BB.CC.DD
        use=if, if=enp2s0 address is 10.7.1.19
        use=if, if=lo address is 127.0.0.1
>>		WARNING:  cannot connect to ipdetect.dnspark.com:80 socket: IO::Socket::INET: Bad hostname 'ipdetect.dnspark.com'
        WARNING:  found neither ipv4 nor ipv6 address
>>		use=web, web=dnspark address is NOT FOUND
        use=web, web=dyndns address is AA.BB.CC.DD
>>		use=web, web=loopia address is AA.BB.CC.DD


The client should never contact/communicate with an unspecified server.