I have Lightroom CC with most current version installed as of May 17, 2016. For some reason, the noise reduction slider is not doing anything on any image. Even at 100%, I can tell zero difference in the image. Is there a bug happening here or am I doing something wrong? I am using the same camera and image settings I have for over 2 years. Nothing has changed that I'm aware of. Any ideas?
I have tried the same at my end and I can change the Luminance, Detail and contrast for the image. I am using WIndows 10
Please check the image you trying to work on is not missing, also you can try reset the Lightroom preferences back to default.
Press the shift + option keys immediately after you restart Lightroom, and select Reset Preferences from the resulting dialog box.