Yep even with 6105 frets notes can go sharp if you are heavy handed (fingered).
If your guitar has stainless steel frets that is the problem.
I was repeatedly breaking the high E at the 12th fret because I was using nickel strings on brand new SS frets.
You have to wear down the crown of the fret a tiny bit- just like if you were playing with conventional frets (nickel on nickel).
So when you have breakage problems with new SS frets you have to play with steel strings for a month or two. That fixed it for me.
If you don't have SS frets I typed this for nothing!
