Every organ plugin I've tried leaves the last notes played still playing after stopping playing. It's obvious they do not receive that final "note off" command but there is nothing I know to do about it. There used to be a setting, as far as I can remember, the sent those events when this happens. I can also turn the notes off my doing a "sweep" up and down my keyboard controller on the specific notes that are hung. What I find strange is that it happens with all the organ plugins I've tried which means it has to be a problem with Sonar.
Sonar 8.5