I frequenly use the "Cinematic 1" Lumetri Looks preset in Premiere Pro but it seems only recenly this preset stopped working. Normally it gives me a nice contrasty look but now it just darkens and flattens the entire image.
It's possible this started happening after I updated my Mac to OSX Mavericks. I also updated all Adobe products to the latest versions and it didn't fix this issue. I checked and Cinematic 1 works fine in Speedgrade.
For now I guess I'll just have to use Cinematic 2 but that means I'll now have to replace Cinematic 1 in 100's of old projects... bah
I have been having the same issue.. Please fix it!
Having the same issue as well (Mavericks + CC 7.1)
Has this issue been resolved. It started for me after I installed mavericks