render error at application startup

Sometimes (~25% of time?) when I start my AIR application on a Galaxy Tab 2 running Android 4.1.2, I get a screen that looks like this:

Exiting and reentering the application causes the application to render correctly sometimes, and sometimes not. The initial screen is a tabbed view, with a screen background image, a single button with a text and static graphic, so I don't see any reason why this should cause difficulties.

This is building with AIR 3.7 embedded.

Does anyone have ideas how I can get stable behavior?