[knot-resolver-users] Knot Resolver 6.20: persistent SERVFAIL after temporary authority unreachability

Hi, I reported an issue in Knot Resolver 6.20 that is causing some problems for me. After a short outage of authoritative servers, the resolver returns SERVFAIL + EDE 22 (No Reachable Authority) and keeps this state for a few minutes even after connectivity is restored. Also, after switching to TCP, it does not go back to UDP. You can find the full description and steps to reproduce here: → https://gitlab.nic.cz/knot/knot-resolver/-/issues/949 Has anyone else seen this issue ? Do you have any better workaround than clearing the cache ?