CopperScott, same problem here with Cubase 7.0.7, OS 10.8.5.
As for you the only temporary workaround I found for making changes is unfreeze, close the session, reopen it and then freeze the track again, which I agree, not a solution. 
I’ve never tried the solution suggested by GargoyleStudio about the Constrain Dalay.
I’ll give it a try, thanks!