> We are reffering to the local stub resolver

yes, i understand that, but i'm asking if you are talking about local
traffic TO the stub resolver, or traffic FROM the stub resolver to your
upstream nameserver.

If you have pcap showing the problem, please attach it.

If you're not sure what I'm talking about, then you should do:

$ sudo systemctl edit systemd-resolved

and in the file editor it opens, add this content:


[Service]
Environment=SYSTEMD_LOG_LEVEL=debug


then save the file and reboot.

then try looking up your host again (using the local stub resolver of
course).

Gather the resolved logs and attach or paste them here.

$ journalctl -b -u systemd-resolved --no-pager

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https://bugs.launchpad.net/bugs/1886128

Title:
  systemd-resolved does not resolve address due to udp payload size.

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