Adobe Air app crashes on iPad2 but not iPad3 on iOS 8.1

I have an app built with Flash Builder 4.7 using Adobe Air (version 15.0.0.356). The app runs some interactive animations (.swc files) and after running for a while on iPad2 the app crashes (can reproduce crash in same scene exactly 5 seconds into animation every time) but runs perfectly fine on the iPad3 both using iOS 8.1. Is this a fixable memory issue? an sdk problem?