Wow. Just for kicks, I tried this:
New Project; Insert instrument (4Front Rhodes); simple instrument track (which I never normally use).
Then I used the PRV to create a simple small clip.
Then I selected the track and right-click Clone.... CRASH!
I've sent the crash report to Cakewalk. CWBRN-30426.
I'll try again, this time using an "approved" in-the-box instrument...
UPDATE:
Wow, same problem. This is with the Studio Instruments Bass Guitar VST. X3e. After a clean boot and first time opening SONAR.
Seems pretty reproduceable, at least on my system.
CWBRN-30427.