I get this weird behavior often in the editors. Feels like Cubase loses its memory after awhile. Usually if if I’m early in the project, I can close and reopen the editor to restore proper behavior, if I’ve been working for awhile, I would need to restart Cubase.
Another thing that happens recently is that if I drag one midi drum part, it will show a copy of that midi part being dragged on another lane, and it will also make a sound. IE. I am dragging a kick, but it duplicates a snare being dragged around.
edi: well look at this, do we all have Macs?