Weird NETWORK_ERRORs

[arabesc]

I have some NETWORK_ERRORs in the query log, e.g.:

[2022-03-15 23:24:09]   opensource.com  DS      NETWORK_ERROR   98ms    scaleway-ams
[2022-03-15 23:24:25]   hosted-by-discourse.com DS      NETWORK_ERROR   174ms   ffmuc.net
[2022-03-15 23:26:01]   graph.facebook.com      A       NETWORK_ERROR   7055ms  moulticast-fr-ipv4
[2022-03-15 23:26:07]   graph.microsoft.com     A       NETWORK_ERROR   7063ms  moulticast-fr-ipv4
[2022-03-15 23:43:07]   app-measurement.com     A       NETWORK_ERROR   7140ms  meganerd
[2022-03-15 23:43:40]   dnscrypt.info   DNSKEY  NETWORK_ERROR   126ms   dns.watch
[2022-03-15 23:43:44]   dnscrypt.info   DNSKEY  NETWORK_ERROR   90ms    dns.watch
[2022-03-15 23:49:24]   stackpathcdn.com        DS      NETWORK_ERROR   148ms   dnswarden-eu-uncensor-dcv4
[2022-03-15 23:49:49]   omtrdc.net      DS      NETWORK_ERROR   175ms   ams-dnscrypt-nl
[2022-03-15 23:53:56]   github.io       DS      NETWORK_ERROR   98ms    scaleway-ams
[2022-03-15 23:54:08]   github.io       DS      NETWORK_ERROR   7061ms  moulticast-fr-ipv4
[2022-03-15 23:54:12]   cdn-images.audioaddict.com      A       NETWORK_ERROR   7062ms  moulticast-fr-ipv4
[2022-03-15 23:54:17]   cdn-images.audioaddict.com      A       NETWORK_ERROR   7066ms  moulticast-fr-ipv4
[2022-03-15 23:54:38]   external-hel3-1.xx.fbcdn.net    A       NETWORK_ERROR   7060ms  moulticast-fr-ipv4
[2022-03-15 23:54:42]   video-hel3-1.xx.fbcdn.net       A       NETWORK_ERROR   7063ms  moulticast-fr-ipv4
[2022-03-15 23:54:47]   video-hel3-1.xx.fbcdn.net       A       NETWORK_ERROR   7059ms  moulticast-fr-ipv4
[2022-03-15 23:54:57]   video-hel3-1.xx.fbcdn.net       A       NETWORK_ERROR   7067ms  moulticast-fr-ipv4
[2022-03-15 23:55:19]   github.io       DS      NETWORK_ERROR   92ms    dns.watch
[2022-03-15 23:55:21]   api.audioaddict.com     A       NETWORK_ERROR   7059ms  moulticast-fr-ipv4
[2022-03-15 23:55:24]   github.io       DS      NETWORK_ERROR   97ms    dns.watch
[2022-03-16 00:02:16]   digitalscores.us        DS      NETWORK_ERROR   116ms   scaleway-ams
[2022-03-16 00:02:30]   profile.gc.apple.com    A       NETWORK_ERROR   7067ms  moulticast-fr-ipv4
[2022-03-16 00:02:31]   profile.gc.apple.com    A       NETWORK_ERROR   7058ms  moulticast-fr-ipv4
[2022-03-16 00:02:32]   init-p01st.push.apple.com       A       NETWORK_ERROR   7066ms  moulticast-fr-ipv4
[2022-03-16 00:02:33]   profile.gc.apple.com    A       NETWORK_ERROR   7062ms  moulticast-fr-ipv4
[2022-03-16 00:02:33]   27-courier.push.apple.com       A       NETWORK_ERROR   7059ms  moulticast-fr-ipv4
[2022-03-16 00:02:35]   www.apple.com   A       NETWORK_ERROR   7060ms  moulticast-fr-ipv4
[2022-03-16 00:02:36]   www.apple.com   A       NETWORK_ERROR   7060ms  moulticast-fr-ipv4
[2022-03-16 00:02:37]   profile.gc.apple.com    A       NETWORK_ERROR   7059ms  moulticast-fr-ipv4
[2022-03-16 00:39:04]   network DNSKEY  NETWORK_ERROR   78ms    sth-dnscrypt-se
[2022-03-16 00:39:07]   network DNSKEY  NETWORK_ERROR   90ms    scaleway-ams
[2022-03-16 00:39:09]   network DNSKEY  NETWORK_ERROR   88ms    dns.watch
[2022-03-16 00:50:45]   edgecastdns.net DS      NETWORK_ERROR   161ms   ams-dnscrypt-nl
[2022-03-16 00:51:48]   macpaw.com      DS      NETWORK_ERROR   186ms   ffmuc.net
[2022-03-16 01:27:09]   aaplimg.com     DS      NETWORK_ERROR   214ms   bcn-dnscrypt
[2022-03-16 01:37:05]   com     DNSKEY  NETWORK_ERROR   152ms   dnswarden-eu-uncensor-dcv4
[2022-03-16 01:41:16]   gateway.fe.apple-dns.net        HTTPS   RESPONSE_ERROR  27ms    controld-uncensored
[2022-03-16 01:41:26]   www.googleapis.com      HTTPS   RESPONSE_ERROR  27ms    controld-uncensored
[2022-03-16 01:41:27]   p51-contacts.icloud.com HTTPS   RESPONSE_ERROR  27ms    controld-uncensored
[2022-03-16 01:41:29]   caldav.fe.apple-dns.net HTTPS   RESPONSE_ERROR  55ms    controld-uncensored
[2022-03-16 02:46:23]   software.macpaw.com     A       NETWORK_ERROR   7065ms  dct-at1
[2022-03-16 02:46:24]   software.macpaw.com     A       NETWORK_ERROR   7085ms  dct-at1
[2022-03-16 02:59:51]   live.com        DS      NETWORK_ERROR   214ms   bcn-dnscrypt
[2022-03-16 03:20:12]   time-ios.apple.com      A       NETWORK_ERROR   7091ms  moulticast-de-ipv4
[2022-03-16 04:04:37]   ocsp.godaddy.com        A       NETWORK_ERROR   93ms    dns.sb
[2022-03-16 04:04:39]   ocsp.sectigo.com        A       NETWORK_ERROR   49ms    sth-doh-se
[2022-03-16 04:04:42]   i.creativecommons.org   A       NETWORK_ERROR   7001ms  dns.sb
[2022-03-16 04:04:42]   creativecommons.org     DS      NETWORK_ERROR   7000ms  dns.sb
[2022-03-16 04:04:42]   yandex.ocsp-responder.com       A       NETWORK_ERROR   7000ms  dns.sb
[2022-03-16 04:04:43]   fonts.googleapis.com    A       NETWORK_ERROR   7000ms  dns.sb
[2022-03-16 04:04:43]   telegram.org    A       NETWORK_ERROR   7002ms  dns.sb
[2022-03-16 04:04:43]   cdn4.telegram-cdn.org   A       NETWORK_ERROR   7002ms  dns.sb
[2022-03-16 04:04:43]   telegram.org    DS      NETWORK_ERROR   7000ms  dns.sb
[2022-03-16 04:04:43]   telegram-cdn.org        DS      NETWORK_ERROR   7000ms  dns.sb
[2022-03-16 04:04:43]   ocsp.pki.goog   A       NETWORK_ERROR   7000ms  dns.sb
[2022-03-16 04:04:43]   ocsp.godaddy.com        A       NETWORK_ERROR   6ms     cloudflare
[2022-03-16 04:04:44]   telegram-cdn.org        DS      NETWORK_ERROR   7001ms  dns.sb
[2022-03-16 04:04:46]   kraken.rambler.ru       A       NETWORK_ERROR   7001ms  dns.sb
[2022-03-16 04:04:46]   cdn4.telegram-cdn.org   DS      NETWORK_ERROR   7001ms  sth-doh-se
[2022-03-16 04:04:46]   fonts.gstatic.com       A       NETWORK_ERROR   7001ms  cloudflare
[2022-03-16 04:04:46]   ocsp.pki.goog   A       NETWORK_ERROR   7000ms  cloudflare
[2022-03-16 04:04:47]   goog    DNSKEY  NETWORK_ERROR   7014ms  cloudflare
[2022-03-16 04:04:48]   pki.goog        DNSKEY  NETWORK_ERROR   7025ms  cloudflare
[2022-03-16 04:04:48]   pki.goog        DNSKEY  NETWORK_ERROR   7001ms  cloudflare
[2022-03-16 04:04:48]   pki.goog        DNSKEY  NETWORK_ERROR   7001ms  cloudflare
[2022-03-16 04:04:48]   ocsp.sectigo.com        A       NETWORK_ERROR   7000ms  doh-crypto-sx
[2022-03-16 04:04:49]   ocsp.godaddy.com        A       NETWORK_ERROR   7001ms  doh-crypto-sx
[2022-03-16 04:04:49]   ocsp.godaddy.com        A       NETWORK_ERROR   7001ms  cloudflare
[2022-03-16 04:04:49]   ocsp.godaddy.com        A       NETWORK_ERROR   7000ms  doh-crypto-sx
[2022-03-16 04:04:49]   ocsp.godaddy.com        A       NETWORK_ERROR   7001ms  cloudflare
[2022-03-16 04:04:51]   fonts.gstatic.com       A       NETWORK_ERROR   7008ms  dnscrypt.uk-doh-ipv4
[2022-03-16 04:04:51]   pki.goog        DNSKEY  NETWORK_ERROR   7001ms  doh-crypto-sx
[2022-03-16 04:04:51]   pki.goog        DNSKEY  NETWORK_ERROR   7001ms  doh-crypto-sx
[2022-03-16 04:04:51]   pki.goog        DNSKEY  NETWORK_ERROR   7000ms  dnscrypt.uk-doh-ipv4
[2022-03-16 04:04:52]   pki.goog        DNSKEY  NETWORK_ERROR   7001ms  dnscrypt.uk-doh-ipv4
[2022-03-16 04:04:53]   pki.goog        DNSKEY  NETWORK_ERROR   7000ms  doh-crypto-sx
[2022-03-16 04:04:54]   t.me    A       NETWORK_ERROR   7002ms  doh-crypto-sx
[2022-03-16 04:04:56]   stun.l.google.com       A       NETWORK_ERROR   7002ms  cz.nic
[2022-03-16 04:04:59]   t.me    A       NETWORK_ERROR   7000ms  cz.nic
[2022-03-16 04:40:51]   software.macpaw.com     A       NETWORK_ERROR   7114ms  opennic-R4SAS

It seems the most of them have happened due to timeout of 7000ms but not all of them. I would like to have more information about the source of the errors. How can I investigate it further?