I have been using Nova launcher for years without problems. Yesterday I bought a Galaxy S9 +, and of course I also installed Nova launcher. But I have a problem with changing the icon of the application drawer on the dock. I can change the icon, but if I confirm, the icon does not change. It always remains the stock icon. I can change the other icons in the dock without any problem. Only that of the application drawer can not change. It makes me crazy because I have always been able to change this on my previous smartphones. Can someone help me?