Error accessing proxy from traefik

I'm using this with traefik and it works like a charm.

...Except when it doesn't. For example, when I must update services, and then restart traefik. Then traefik restarts without error, and the container becomes "healthy". But requests to services time out.

I thought it was a traefik problem. Then I checked the logs, and every time I have this issue I see something like this:

time="2023-07-17T07:44:45+03:00" level=error msg="Provider connection error error during connect: Get "http://tecnativa:2375/v1.24/version": dial tcp: lookup tecnativa on 127.0.0.11:53: no
such host, retrying in 9.503388201s" providerName=docker

The "no such host" part is incorrect, because the tecnativa container is working, and reported as "healthy". I wonder what that v1.24 is?

The only solution is to restart both traefik and tecnativa (and sometimes other services which are served by traefik!)

I am using the most recent official tecnativa release 0.1.1. And docker 24.0.4 on debian.

Any ideas?

No source file or test is named. Start by reproducing the restart sequence with docker-socket-proxy 0.1.1, Docker 24.0.4 on Debian, and Traefik, then compare the proxy and Traefik logs around the DNS failure. Done means identifying the cause of the failed service lookup and defining a verified fix or documented workaround.