Color Correction wanishes

Hi.

I have a strange problem with my latest project regarding color correction changes. All of a sudden i can not make perminant changes in the color section, I use to but not any more. The old changes are in place, but if I make some new ones, the can be seen and the stay in place until i quit the app. When i restart the app, they are gone.

Everything renders fine, i can export the video with the changes as long as I dont restart the application.