I actually found a bug and figured out how bypass it.
Simply clone the track, it will not work. The blank lane keeps popping up, with nothing inside.
I created a new midi track from scratch, and I manually copied all the clips to this new track.
When I open this new track in the PRV, the CC 3 lane appears, but now shows a lost event there.
Manually deleting the event, I close and open the PRV for this new track and the CC 3 lane no longer appears.
Then, for some reason, some events are lost in the Sonar, not even appearing in the Event List.