Dorico Pro creating a new instrument: Guitar copy reverts to piano fingering and sound

Hi

For various reasons I want a non-transposing guitar, and it was pointed out her that I can do this by creating a new instrument based on the existing instrument, and alter the transposition. However, when I did this using ‘Classical Guitar’:

  • the fingering reverted to over the staff , and
  • the sound associated with it was a piano

This happened even when I simply copied the instrument with no changes. I found the same behaviour copying the Semi Acoustic Guitar.

Either I’m doing something wrong, or there’s a bug? Obviously I could alter the sound, but it’s the fingering I want.

Any thoughts or experience?
Thanks