Sliders are not resetting back to 0 when I double tap on the screen

I'm using a samsung Galaxy Tab 7 and have been using Lightroom for a while. After the last update for the app, when ever I try resetting one of my adjustment sliders for anything ie Highlights, Shadows, Exposure. It drops it all the way to the lowest value to the far left side of the slider, Instead of '0' in the middle of the slider.