Klwp closes and has to be reset to the wallpaper every time I load preset and open another app.

I'll load and save a preset and if I go to open any other app like Facebook or YouTube or browser when I exit back to the home screen kustom has been closed and the wallpaper on my home screen is set back to the default home screen wallpaper that comes stock with phone and I have to reopen kustom and reset it as my wallpaper. This problem has made me completely stop using app.