ExAWS.S3.list_buckets() fails when virtual_host is set to true

[Xe]

Hello,

I'm trying to write some example code to list all S3 buckets when using virtual hosting mode and I'm running into a strange issue. This code causes nxdomain errors:

defmodule ListAllBucketsTest do
  use ExUnit.Case

  test "list all buckets" do
    response = ExAws.S3.list_buckets() |> ExAws.request!()

    if response.status_code == 200 do
      IO.puts("Buckets:")

      for bucket <- response.body.buckets do
        IO.puts(bucket.name)
      end
    else
      IO.puts("Error listing buckets")
    end
  end
end

Here is my config/config.exs file:

import Config

config :ex_aws,
  debug_requests: true,
  json_codec: Jason,
  access_key_id: {:system, "AWS_ACCESS_KEY_ID"},
  secret_access_key: {:system, "AWS_SECRET_ACCESS_KEY"}

config :ex_aws, :s3,
  scheme: "https://",
  host: "s3.amazonaws.com",
  region: "us-east-1",
  virtual_host: true

This throws errors like this:

12:44:07.729 [debug] ExAws: Request URL: "https://.s3.amazonaws.com/" HEADERS: [{"Authorization", "AWS4-HMAC-SHA256 Credential=hunter2"}, {"host", ".s3.amazonaws.com"}, {"x-amz-date", "20250211T174407Z"}, {"x-amz-content-sha256", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"}] BODY: "" ATTEMPT: 7

Disabling virtual host style requests makes this test work.