Strange Crash in ionic App

I added some new features to an app which was build using cordova 3.8.0 and ionic 1.0.0.

I have Cordova 5.1.1 and ionic 1.6.1. I ran this app on iPod Touch 4th Gen iOS 8.4 and iPad 2 8.4 and iPhone 5S 8.4. Everything works perfectly. But when I run it on iPad Air or iPhone 6 Plus or iPad 4 Gen, it crashes at a specific location in the app without any exception in the console/safari/XCode.

I check the crash log on iPad and it shows JetsamEvent for this app's process but this Low Memory warning also occurs on iPad2 but it doesn't crashes. Whats wrong with iPad Air, iPad mini and iPhone 6S.

I doubt localStorage for this crash. What happens if localStorage exceeds some limit? How can I find the reason behind this crash because I can't see any log? Any debugging tool etc?

Thanks,