The Game Instance Class (Project Settings, Project, Maps and Modes, Game Instance) needs to be set to Platform Game Instance or any custom class that derives from it. This is necessary for the app to detect states like foreground or background changes.
Building For Android
There are some settings that need to be set in the project settings in the Android platform.
Platforms : Android : Build
Make sure arm64 is enabled. Leia Unreal SDK supports both OpenGL.
Platforms : Android : APK Packaging
Enable Package game data inside .apk and Fullscreen Immersive setting.
With these settings, you will be able to build an apk which runs on LitByLeia devices!