App completely restarting when launched by icon press in launcher

Question

I\'m in the process of trying to make a release build of my first android app to send to a few testers. However, I ran into a problem with it. When you exit the app and then

Answer 1

All of the solutions above didn't work consistently on all of my devices. It worked on some Samsung but not all.

The cause of the problem for me was installing the APK manually.