seeing that KYM article felt baffling so I had to look things up
here's a 4/v/ post from 2015 that uses it in the "modern" sense, because I know that I've seen it used in normal speech and it isn't just some modern meme bullshit from 2020
https://arch.b4k.co/v/thread/318643076/#318646604

the post is a bit of a trainwreck grammatically so I dunno if it's just using the phrase in normal speech or not
if the post had the words "skill issue" outside of a sentence, I'd totally say that's R8, that blew up in 2021 as a no-thought-required set phrase
but just describing something as being an issue with skill (and in context, it seems to be used that way?) really shouldn't be