I’m exporting an track with chords to Dorico through Music XML. The track is A flat. The first chord is notated as D flat in the score Editor (see image). The exported Music XML turns this into C sharp.
C 1 major  [TEst.zip|attachment](upload://1p2pqoiQwCFvZO33epwilXmfXj7.zip) (254 KB)