There's still a bug on the latest OS on this regard. When you change arranger variations using footswitch while you're on the voice window, arranger a,b,c works fine, but when you select arranger d, the footswitch will send a number '4' on the voice menu that will select the 4th voice. Because of this, i'm also stuck using one voice per song, it's kind of difficult for me to select voices on the fly. I wish there's an easier way, but the footswitch helps a lot to control the MidJay in live situation.
Jimmy