A. Ensure your iPhone's operating system is up to date, as app stability can be affected by outdated software. Go to Settings > General > Software Update to check for updates. Additionally, try uninstalling and reinstalling the app to clear any corrupted data that might be causing instability.

B. Clear the app cache by going to Settings > General > iPhone Storage, find the LATAM Airlines app, and select 'Offload App'. This will remove the app but keep its documents and data. Reinstall the app from the App Store to see if this resolves the instability.