css comments after minification

Dear Raul,

Please let me know why huge blocks of comments remain in the minified and combined version of css files.
I found this huge (1130 charcters) block of copyright+license comment block in the minified css code (please see linked image).
https://imgur.com/7OGVuYM
There are 20 other comment sections in the same file, lucily those are shorter, but all together those blocks are taking up kilobytes of useless information.
Could these comments be removed from css files?

Thank you!

Best regards,
Endre