My world always disappears at random times after the caves and cliffs update where Mojang moved the file storage directory from internal/games/com.mojang to internal/android/com.minecraftpe/files/com.mojang

Why???
My Minecraft is as if it was freshly installed, where I have to redo all the settings which were reset to default. I've tried to reinstall mimecraft via playstore, but it still doesn't work.