1. If your mobile phone system has been upgraded and the application has not been updated for a long time to be compatible with the latest system, this will cause the application to flash back. For iOS devices, if the application has a time lock, but the option to remove the time lock is not selected during the signature operation of Apple Enterprise, this will also lead to flashback.
2. The version of the application is too old or there are known errors. Make sure your app is the latest version, or check the app's official forum or social media page to see if there are any announcements about known problems.
3. In the Android system, if the cache is not cleaned for a long time, the application will flash back. Too many running programs also lead to insufficient memory of the mobile phone, which in turn leads to the application flashing back.