my main axe is an artcore semihollow but i just avoid fretting over those areas
Like I said, fret levelling.
I have 2 Artcores. Both had frets that were uneven in height. This is frustrating since everything else on the guitar seems perfect. In your case, it's probably the 12-14th frets that are high, same as on my AG75.
A luthier can easily crown and level the frets, eliminating that buzz.