Hi, My project is due pretty soon and I am having an issue in Ae! when I use Ctrl+Z, the screen does not update the undo and it still shows the visuals before the ctrl+z. I tried purging it! It does not work! I have to close the program and open it again until it shows the correct state. I am not sure if it is AE problem, but I also tested my GPU and Ram and they are working correctly! I greatly appreciate your help in it, as I am so stressed out for my thesis deadline!
That's just another bug in CC 2015. You could get rid of it and install CC 2014. Otherwise you will have to muddle through.