You open the app.
The screen loads for a second.
It looks normal.
Then syncing begins.
And the app suddenly closes.
No warning.
No error message.
It just disappears.
This usually happens right when the app tries to sync data.
Profiles, settings, messages, or cloud content start loading.
Before anything finishes, the app shuts down.
At this point, the app is not frozen.
It is actively working.
The crash happens because the sync process fails instantly.
Data sync often runs heavier tasks than a normal launch.
It pulls multiple requests at once.
If one critical request breaks, the app cannot continue.
Some apps are not built to recover from partial sync failures.
Instead of retrying, they exit.
This is common after account changes, corrupted cache data, or server-side updates.
The app expects clean data.
What it receives is incomplete or invalid.
When syncing crashes the app every time, the launch itself is not the problem.
The failure starts the moment data synchronization begins.