global color slider occasionally stuck
We work from a preset set of colors that I have set up as global colors so that we can easily use percentages of each color in the projects we work on. I have found that not infrequently the global color slider will get "stuck" on the initial percentage it is set to. Trying to change the percentage by typing in a new percentage will get set back to the percentage that it was originally set to (I was just working on a project where I set it to 30% initially. That looked too faint so I typed in "40" but the slider kept going back to 30% when I hit return.) To get out of this I move the slider a few degrees using the pointer and then I can type in the number and have the new number stick.
Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.