Apologies for the delayed response.
Are you making any calls to Geometry, not just to user data in general?
What’s the latest Android version the crash occurs on? While we don’t use Google’s Oboe API, there is a known issue (which was scheduled for fixing in Android T) with Oboe where other applications can cause a crash when backgrounded, which sounds like it may be what you’re describing. Does anything described here and in the linked github issue line up with your experience? Fmod crash on android crash stack libaudioclient.so - #12 by jeff_fmod