dns abc2bd.dns.nextdns.io ????

I kindly ask if it is possible to do something about the dns filters, as I use Malwarebytes for Android, but if I put as dns abc2bd.dns.nextdns.io , the app does not update my signatures for protection anymore, instead if I put as dns0.eu, it does. It is really a pity, also because I am very happy to use nextdns and the Android nextdns manager app. Thank you.