Defender warning me about weird cache files

Hi guys, I'm receiving more than 1000+ warnings (in red) of some kind of "cache file" inside my /wp-admin/css/cache folder, does anybody know where are this files coming from? I assume is from one of the cache system I have in my site but I'm not sure...

Sorry to bother you with this kind of stuff, but I'm not really an expert in this kind of things. I granted support access to my site if you need to enter to see what I mean. Also, I've attached an image of what I'm looking at.

Thanks for your time and help!