In a reverse proxy scenario I don't want Caddy to retry GET requests when an upstream has accepted the request from caddy. As far as I understood this is doable in Caddy by setting the following config:

"retry_match": [
  {
    "method": []
  }
]

My problem is that, doing so, I get intermittent no upstreams available from Caddy. I've put a full repro on this repository.

As no upstreams available suggest that the error occurred before a connection was established to the upstream, and reading this comment, I don't get why the request is not retried.