I’m having this issue in Dorico 4 with @Bollen 's expression map for Sample Modeling (Expression Maps for Sample Modeling). It appears to be a similar issue - it looks like Dorico is playing the note two octaves above the touch fourth which is correct, but Sample Modeling has mapped the harmonics so they sound an octave above the regular note. This means that Dorico tries to play the pitch three octaves above the touch fourth, which is often out of range of the instrument and cannot play at all. The solution of some multi-script for CSS does not help me as the issue is with Sample Modeling strings. I tried to add the transpose property to natural harmonic 1 under the expression map and it didn’t do anything, I could see in Kontakt the same pitches were being triggered.