Encrypted dns.nextdns.io NOT working?

Strange things happening!

Router-client.dns.nextdns.io. <--- NOT working encrypted,
So I've added these older ones that actually work:
Router-client.dns1.nextdns.io
Router-client.dns2.nextdns.io

I ran this test on my laptop behind the router: https://nextdns.io/diag/aa7d8dd0-663c-11ee-9858-5959568eb044