Chords playing in wrong key

I have a jazz lead sheet imported from MuseScore 3 into MuseScore 4 for solo saxophone with chord symbols.
When I press Play in concert pitch it is fine.
When I switch off Concert Pitch, the notes and the chord symbols change to the transposed key, as one would expect.
But now the chords play in the written key whereas the notes playback in concert pitch as I would expect.
So the chords are now in a different key from the notes.