You tap the app icon.
The app opens.
You see the main screen for a split second.
Then it closes.
No warning.
No error message.
You’re back on your home screen.
You try again.
Same result.
This is one of the most confusing app failures.
The app clearly launches.
It reaches the main screen.
But it cannot stay open.
In this situation, the app is not failing during startup.
The crash happens right after the app finishes loading.
This often means something breaks the moment the main screen becomes active.
User data loads.
Settings sync.
Background checks run.
If one of those steps fails, the app shuts itself down.
From the user’s perspective, it feels instant.
From the system’s perspective, the app exits to avoid a deeper crash.
When an app closes immediately after showing the main screen, the problem is not access.
It’s what happens right after access is granted.