Can’t resolve

My Omnia regularly cannot resolve - can someone dig into this and check what’s wrong?
Forwarding is disabled, DNSSEC is enabled.

nslookup: can’t resolve ‘’: Try again


That’s certainly the same problem as for this user DNS resolver dropouts (or hangs?) – all known cases depend on the nameserver from which is somehow serving as a canary for this problem, but what exactly is the root cause is unknown so far. (I’m sorry.)