css.map file not found

[pl71]

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?