This may be a Twilight app problem (https://play.google.com/store/apps/details?id=com.urbandroid.lux&hl=en) rather than a KLWP, however I have a repeatable bug. Whenever Twilight is active and KLWP is active, if you enter a whitelisted app (an app where you've specified Twilight not to dim the screen in) KLWP will crash and you will have to reset it as a wallpaper