When I opened a .ccProject file, a dialog was displayed saying that 2 of the sliders could not be found (see screenshot). I pressed the Close button and examined the sliders for the character and all of the sliders were present, including the 2 listed in the dialog.
So I saved the .ccProject file again, closed and reopened the project and I get the same dialog about the same sliders everytime I open the project. So far, it doesn't seem to interfere with any of my animations or renders, but I thought you should know.
If you'd like, I can provide the .ccProject. Its 130MB, so I'd have to do it via a google drive link.