I don't really know how to fully articulate the problem it's so odd, but I will try.
I have tried to record a piano part the past couple days, first using noire, then grandeur, now Alicia's Keys all with the same problem. I am plying an Eb chord above middle C, and there is a sharp high overtone ring that happens that almost sounds like feedback. It only happens on that chord and specifically when I play the Eb. I noticed when I played the recording back on my monitors, it happens in my headphones as well. It does not happen in any other range or chord. it appears a little with g minor with the Bb as the third, and Eb in second inversion with that Bb as the bass (below middle C), but the root position Eb chord above middle C triggers it. It is very loud to the point that its almost painful if I am playing consecutive Eb chords with the pedal down.
No other VSTs have behaved like this, I switched to an upright piano model like the gentleman and I did not notice. It is oddly only the concert grand style pianos. does anyone know what this harmonic feedback like trigger could be???