I have face the same problem. DNS not work, site full death :(www.ashbd.com
I register my priv8 nameserver
I add my site in Vesta Panel, without market DNS section
then I see, there is no site added in "DNS" Section. I added DNS section to my website.
Then I edit record, also set ns1 , ns1 nameserver on DNS
& Also choose Template child-ns
What is wrong I can't understand. my other domain has run successfully, but I have face this issue in this domain.
Domain Provider said the problem is in my server