Savegames for Android 11 either dont work at all or get erased after app update

Tried almost all previous solutions and tried a few combination of settings which are not discovered yet (I guess). Majorly what I see:
Having ExternalFilesDir enabled, actually stores SaveGame but erases it after each update or uninstall. Having ExternalFilesDir disabled (expecting Savegames are stored internally), does not store the Savegame at all. Having in both cases Storage Permission by the User, I suspect there is a major Bug when targeting Android 11 there is currently no working solution for Savegames and keeping them after game updates. Beside that if there is any solution it is rather a tweak, I am not seeing a working concept for savegames of Games made with Unreal working on Android 11