It's a pity glauca.digital's DNS services (secondary setup) can't connect to my server, and I can't figure out why. I already opened a ticket in the past, but we didn't finda clear solution. Maybe I misconfigured powerdns. Who knows?
I *think* I can't recommend 1984.hosting for secondary DNS if you use DNSSEC at the moment. It *appears to me* they don't replicate/refresh the RRSIGs. So I **assume** they simply check the SOA serial and only fetch the data if it changed.
Don't you love it when #DENIC says "UPDATE FAILED", because you have to edit *your own zone's* NS entries *first*, and only then go to your registrar to edit the nameservers there.