Always (since 2000. that I remember), I have been able to monitor midi thru when the program is open and not only when playing (something that is happening since updated to 2017) I used to enter the chords with my guitar (fishman triple play). I checked the settings, compare with real band midi setting and I nothing has changed. Mid thru work perfectly in real band (I also checked other DAW). A way around is to keep open Real band then you can hear your keyboard or midi guitar as a reference. I hope tech support will give and answer soon!