I am trying to stream into a csv file using nimble_csv(1.2.0) but running into issues.

This is the code I am using to create a csv file from the stream.

defmodule Utils
  alias NimbleCSV.RFC4180, as: CSV

  def write_to_file(content_stream) do
    path = Path.join(System.tmp_dir(), "#{UUID.uuid4(:hex)}.csv")

    content_stream
    |> CSV.to_line_stream()
    |> CSV.parse_stream([skip_headers: false])
    |> Stream.into(File.stream!(path, [:write, :utf8]))
    |> Stream.run()
  end
end

This is my test data

contents = [
    "First Name,Last Name,Email\n",
    "David,Byrne,david@test.com"
  ]
  |> Stream.map(&String.trim_leading/1)
   
Utils.write_to_file(contents)

The file is created however the contents in the file are missing the comma separator
and the new line characters

First NameLast NameEmailDavidByrnedavid@test.com

If however I update Utils.write_to_file/1 to by removing parse_stream/2

def write_to_file(content_stream) do
    path = Path.join(System.tmp_dir(), "#{UUID.uuid4(:hex)}.csv")

    content_stream
    |> CSV.to_line_stream()
    |> Stream.into(File.stream!(path, [:write, :utf8]))
    |> Stream.run()
end

I get the csv contents in the correct format.

First Name,Last Name,Email
David,Byrne,david@test.com

I am not sure if I am missing any options that I need to pass to parse_stream/2 that would cause the contents to be malformed.

Any help would be appreciated