I’m pretty sure I know your problem
Here’s me going through it
http://hub.jmonkeyengine.org/forum/topic/android-game-release-bugs/#post-285466
Here’s an unfortunately unanswered thread with a similar problem
http://hub.jmonkeyengine.org/forum/topic/sometimes-assetnotfoundexception-interfacefontsdefault-fnt-thrown/
I’ve had it a trillion times before (also test devices aren’t necessary if you’re using a debug version of your APK)
But I had this problem a long time ago (I’m surprised I forgot to add it)
My guess is that you’re game is in Landscape and you’re opening in portrait.
You need to specify the screen layout in the manifest
android:screenOrientation=“landscape”
In the activity section of your manifest
Found here on line 10.
Also make sure you have the On Destroy method I posted above!
You must have the onDestroy method!