Sticky sliders (popping back to 0.0, jumping, not responding, etc.) have been an issue since LR4, LR5, but was mostly fixed at the release of LR6. Very responsive! Now with 6.1, it's worse than ever. Exposure and WB especially become non-responsive or pop back and forth, making editing horrendous and very time-consuming.
Looks like a number of people are experiencing similar problems. Please add your opinion and vote to this topic in the official Adobe feedback forum: http://feedback.photoshop.com/photoshop_family/topics/lightroom-cc-exposure-slider-unrespo nsive-after-up-date. Continuing the discussion there will keep the discussion focused in one thread and make it more likely a solution will be found. Adobe actively participates in that forum, but not in this one (a user-to-user forum). Adding both a vote and a reply with the details of your problem will help Adobe understand the extent of the issue (or issues).
I'm having the same issue. Pen pressure doesn't work if Windows Ink option is not enabled. if I turn on Windows Ink option then I get sticky sliders.