`KONG_ACCESS_TIME` doesn't have value if plugins use `kong.response.exit`. Is it expected or a bug?

Questions
1

Per the following code, Kong skips runloop.access.after(ctx) if ctx.delayed_response has values. Therefore, KONG_ACCESS_TIME is not calculated.

function Kong.access()
  kong_global.set_phase(kong, PHASES.access)

  local ctx = ngx.ctx

  runloop.access.before(ctx)

  ctx.delay_response = true

  for plugin, plugin_conf in plugins_iterator(ctx, loaded_plugins,
                                              configured_plugins, true) do
    if not ctx.delayed_response then
      kong_global.set_named_ctx(kong, "plugin", plugin_conf)
      kong_global.set_namespaced_log(kong, plugin.name)

      local err = coroutine.wrap(plugin.handler.access)(plugin.handler, plugin_conf)

      kong_global.reset_log(kong)

      if err then
        ctx.delay_response = false
        kong.log.err(err)
        return kong.response.exit(500, { message  = "An unexpected error occurred" })
      end
    end
  end

  if ctx.delayed_response then
    return flush_delayed_response(ctx)
  end

  ctx.delay_response = false

  runloop.access.after(ctx)
end