Instrument change to a differently transposing instrument results in the wrong key signature
When you change the instrument then click the "concert pitch" button the key signature gets changed as it would for the original instrument Instrument_Change_Bug.mscz
Comments
Very strange, and toggling concert pitch doesn't ever get it back to C Major, it switches to Eb-Major and then just stays there no matter how often you toggle. Please report this in the issue tracker
Edit: thanks for #302967: Instrument change causes wrong key signature