ActiveRecord time field issue with timezone

rails.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  gem "rails", "7.1.1"

  gem "pg", '1.5.4'
end

require "rails"
require "active_record/railtie"
require "minitest/autorun"
require "logger"


# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "postgresql", database: "postgres", username: "postgres", password: "postgres", host: "localhost")
ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Schema.define do
  create_table :posts, force: :cascade do |t|
    t.time :start_time
    t.time :end_time
  end
end

class Post < ActiveRecord::Base
end


class Application < Rails::Application
  config.load_defaults 7.1
  config.time_zone = "Brasilia"
end

class BugTest < Minitest::Test
  def test_timzezone_aware_attributes
    ENV["TZ"] = "UTC"
    post = Post.new(start_time: "12:00", end_time: "22:00")

    puts Rails.application.config.time_zone, Time.now

    puts post.inspect

    assert_operator post.end_time, :>, post.start_time

    post.save!

    post.reload

    puts post.inspect

    assert_operator post.end_time, :>, post.start_time

  end
end