Yeah, I've encountered this: the Swatch Options panel opens showing a color mode of HSB, but the sliders are RGB. I found that switching the color mode to something other than HSB then back again resets the panel, and it functions normally. I've restarted the app and the problem has not reappeared.
I've restarted my illustrator and my mac 3 times. It doesn't work for me. Maybe I need to delete all Adobe products and reinstall them again. Also, there is an unanswered report on illustrator.uservoice.com