ns2.bepanthen-sampling.com has no AAAA records.
Question and response
Question
dig ns2.bepanthen-sampling.com. AAAA
Answer
ns2.bepanthen-sampling.com. 5 CNAME bepanthen-sampling.com.
Authority
bepanthen-sampling.com. 626 SOA ns-1958.awsdns-52.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0