I have at long last found the problem in my project and attach a barebones project.
Screen with one button. When button text is "OK", project works fine in debug and release.
When typeface is set to material icons and a tick chosen as icon then project compiles and runs in debug but crashes in release. "Unfortunately ... has stopped".
#BridgeLogger shows "java.lang.RuntimeException: java.lang.RuntimeException: Object should first be initialized (Button)."
What am I doing wrong? Have tried on Android 4.4 and 5.0. Also two different desktops (win7 32bit and win7 64bit)