I've been following your plight, and wanted to offer a suggestion when I had the chance. I don't have Rapture Pro, but your issue has the classic symptoms of an accidental MIDI Learn binding in Cakewalk synths.
Try right-clicking on the Pitch Tracking widget (I guess it's a knob now). See if Pitch Bend is 'bound' to that control. There are several ways to remove it; the easiest being a Reset. At least that's the way it works in Rapture / Dimension Pro.