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

Another strange cause, restart occurs only when app was launched by clicking on "OPEN" after Copy-to-Device-&-Install.

Test on OS8.1, no launchMode in activity.