I’ve added a “Quit” button to the ThirdPersonTemplate, which fire a “Quit Game” action in blueprint.
No pb to build/deploy the app on my Android device (Samsung Note 4).
After pressing the button, the app is closed, but i get an error message “application has stopped”.
I’ve been getting the same result as you recently. I am using 4.15 I had not built the APK for Android in a few engine versions and do not remember specifically which version it was last working on.
It doesn’t seem to be happening on all devices though. I ran it on a Moto X Pure and a Pixel. The Moto X displays the problem where the Pixel does not.