Gopher server doesn't support binding to localhost

In my prod.exs, I have:

config :pleroma, :gopher,
  enabled: true,
  ip: {127, 0, 0, 1},
  port: 7070

In https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/gopher/server.ex , I see:

defmodule Pleroma.Gopher.Server do
  use GenServer
  require Logger
  @gopher Application.get_env(:pleroma, :gopher)

  def start_link() do
    ip = Keyword.get(@gopher, :ip, {0, 0, 0, 0})
    port = Keyword.get(@gopher, :port, 1234)
    GenServer.start_link(__MODULE__, [ip, port], [])
  end

  def init([ip, port]) do
    if Keyword.get(@gopher, :enabled, false) do
      Logger.info("Starting gopher server on #{port}")

      :ranch.start_listener(
        :gopher,
        100,
        :ranch_tcp,
        [port: port],
        __MODULE__.ProtocolHandler,
        []
      )

      {:ok, %{ip: ip, port: port}}
    else
      Logger.info("Gopher server disabled")
      {:ok, nil}
    end
  end
end

So start_link seems to respect the ip parameter, but despite it being passed to init, it's not used anywhere.

With this hunk, ip: {127,0,0,1} in the configuration has the expected behaviour:

diff --git a/lib/pleroma/gopher/server.ex b/lib/pleroma/gopher/server.ex
index 82e241f..2f89177 100644
--- a/lib/pleroma/gopher/server.ex
+++ b/lib/pleroma/gopher/server.ex
@@ -17,7 +17,7 @@ defmodule Pleroma.Gopher.Server do
         :gopher,
         100,
         :ranch_tcp,
-        [port: port],
+       [{:ip, ip}, {:port, port}],
         __MODULE__.ProtocolHandler,
         []
       )

I'll see about putting an MR together, but I suspect the test framework will be beyond my current elixir powers :/