Hi there, just tested this out by myself. Perhaps you want to know what you were banging your head against. I was about to try to “expose” the Component by creating a OwnCineCameraActor based on CineCameraActor. You have the required Camera Component in there.
The strange bug is: Even when it says it is type of CineCameraComponent: As soon as you want to access it you just get it as CameraComponent. So you need to cast it:
Hope that clears things up for you 
You got tricked by an editor bug, but you tricked back anyway