We've been using Traefik in prod for 2 years. While I used NGINX in the past, I decided to migrate to Traefik mainly because of the automatic let's encrypt integration.
I am sorry for that decision.
Traefik's documentation does not make sense to me or my team.
It is finicky and misbehaves without proper logging.
As an example - when I want to recreate the certificates - it fails sporadically leaving prod down for an indefinite amount of time.
We're moving back to NGINX.