Found this never seen error in logs the day afyer updating bind server from 9.11 to 9.16

named[4019814]: ../../../lib/dns/resolver.c:5298: unexpected

extract from logs following

Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'www.wis-jma.go.jp/AAAA/IN': 151.99.125.2#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'ftpservice.knmi.nl/A/IN': 151.99.250.2#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'support-connector-service-new.azurewebsites.net/A/IN': 151.99.125.1#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'pool.ntp.org/A/IN': 151.99.125.2#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'mx04.aws.infinidat.com/A/IN': 151.99.250.2#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'e2903.dscb.akamaiedge.net/A/IN': 151.99.0.100#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'dpfitexternalarchive.blob.core.windows.net/A/IN': 151.99.0.100#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'bg.microsoft.map.fastly.net/A/IN': 151.99.0.100#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'scapi.vmware.com/A/IN': 151.99.0.100#53
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'dns.msftncsi.com/A/IN': 151.99.125.2#53
Sep 11 16:08:11 venere2 named[4019814]: ../../../lib/dns/resolver.c:5298: unexpected error:
Sep 11 16:08:11 venere2 named[4019814]: '_.metoffice.cloud/A' is not subdomain of 'wafs.metoffice.cloud'
Sep 11 16:08:11 venere2 named[4019814]: timed out resolving 'a.privatelink.msidentity.com/A/IN': 151.99.250.2#53