If you CC while you have combo orbs, the client shows that you have your orbs, but the server disagrees. When you attack something, you revert to having one orb, and Coma (and others presumably) show damage without actually dealing any.
So should the orbs disappear completely on cc'ing or should they be staying? I'm assuming they should stay?
I don't think it really matters; the only problem I had was CCing to kill low level bosses and not being able to Coma them. I can only imagine it would be easier to make them persist, though.