While editing, suddenly, the little GAIN slider, where you grab the blue dash, and pull it down, or back up... will stop working. Once it stopes. My project is trash, and I have to start over. Nothing I do, makes it work again, other than deleting the track, and starting over, which could be 100 edits lost. ALL the other sliders work still, just the ONE in the ONE section of the track, stops working. SO, say I'm editing a 30 min video... I make 25 or so cuts, edits, etc, in the 1st ten min. All those cuts audio sliders will work. Suddenly the remaining 20 min of that video, the slider stops working. No way to get it back. I've re-shot entire segments, only to have it happen on the new file as well. Suddenly, the volume of the remainder of that track is also blasting loud.