I've no idea why but bass lines are still not accurately reflecting the harmony on certain chords. mMaj7 and 7susb9 are good cases in point. With the mMaj7 you get the b7 played by the bass but not the maj7. The 7b9 consistently produces natural 9ths in the bass. You can try this with just about any style you want.

Strangely enough the same fault occurs in the scale suggester function. Try outputting a non diatonic jazz scale over a 7susb5b9 for example (or any other altered suspended dominant)and you'll get only a mixolydian avoiding the altered tones altogether.

I'm guessing the problem lies with the chord 'masks' in the midi engine that control what gets played over chords.

Maybe someone at team PG can verify.

Regards

Alan