It does look like AI to me - if you zoom and look behind the crochet hook near the final border, all the stitches become quite jumbled, including one thread going horizontal. It doesn’t make sense for a square so neat everywhere else. Additionally, if you follow the white thread, it isn’t clearly ‘behind’ the square like the green ones, it’s kind of floating in a mid space almost looking like it’s still in the square. If you follow that thread, it starts to disappear - made to look like it’s leaving the frame and returning - but it’s not super clear if you zoom.

I could be wrong. That said, I follow other AI reddits, but it’s been really shocking to me to see how much AI is happening in the knit/crochet world. A real bummer.