css.map file not found

There is a warning in Firefox DevTools:

Joomla integration /*# sourceMappingURL=media/vendor/awesomplete/css/awesomplete.css.map */ leads to 404 error

Following code results in no error: /*# sourceMappingURL=/media/vendor/awesomplete/css/awesomplete.css.map */

Joomla 5.0.3

So, who is responsible for this warning - you or Joomla team?