App started crashing on iOS 12.3.1 on launch, while it perfectly works on iOS 13 & > 12.3

It takes more than 20 seconds to launch on iOS 12.3.1 and the app crashes due to watch dog limit gets exceeded, it works perfectly fine on iOS < 12.2 & > 12.3, not sure what kind of wierd issue is this.

Replies

Could you describe what the app does on launch ?

Is it trying to load some data ?