[knot-dns-users] Does all RR in RRSet need to have same TTL

Hi, I would like to ask about the implementation of the Resource records in RRSet in KnotDNS. I have the domain with the three TXT record with same class IN for the same label ('@') and with the different TTLs. In nsd and bind DNS servers seems everything fine, but in KnotDNS I got the warning and error: knotd[551]: warning: [xxxxxxx.xxx.] zone loader, RRSet TTLs mismatched, node 'xxxxxxx.xxx.' (record type TXT) knotd[551]: error: [xxxxxxx.xxx.] zone loader, failed to load zone, file '/etc/knot/files/master.gen/xxxxxxx.xxx' (TTL mismatch) knotd[551]: error: [xxxxxxx.xxx.] failed to parse zonefile (failed) knotd[551]: error: [xxxxxxx.xxx.] zone event 'load' failed (failed) Is it a correct behavior and other DNS servers don't check it or is it a bug in KnotDNS? Thank you for reply. Cheers, -- Zdenek