Diatonic transpositions incorrectly handled for transposed instruments [reproducible]
The problems exists in version 2.0.2 (f51dc11).
The French Horn displays these notes in concert pitch:
but these notes in non-concert pitch:
In non-concert pitch, the correct notes should be C natural (the displayed pitch is one semitone high) and F sharp (the displayed pitch is one semitone low). When the score is exported to MusicXML, the error is retained even if the score is displayed in concert pitch.
There seem to be a number of bug reports with transposition problems when in the key of C. I checked the open ones and I can't quite make out whether this problem currently has an active bug report or not. In this case, I am not using the Transpose feature, just turning on/off the display in concert pitch option. In the case of the MusicXML problem, I am just exporting.