I use Action Launcher and have it set as the default in my settings. However, when I close all apps through the app switcher, it goes to the Samsung launcher, which I don't have set up. If I hit home from the Samsung launcher, it goes to the right home screen.
that's a known bug but I found that if I set samsung home as the default launcher and then set the 3rd party launcher as the default launcher and that fixed it for me
