After the update, the save file doesn’t seem to consistently save or load information. Like if you press Play in the new version you’ll notice that all models are missing even though they should be loaded from the save file at construction time.
Also the achievements still don’t work. And I am not sure what you mean.with the game instance thing.
With the APK that you provided me, everything loads perfectly fine. The only thing I notice is that the achievements still aren’t working. It keeps up to date with the times you’ve played the game.
Regarding the GameInstance. Please go to Edit > Project Settings > Maps & Modes > Game Instance and then press the little magnifying glass that’s beside the drop-down menu.
Please see image for an example:
Once you’ve hit that button, the content browser is going to update and highlight the GameInstance for you. This GameInstance being used in your project is made out of C++ but if you’re more of a blueprint person, you can create a new one in blueprints and go from there (don’t forget to update in the project settings when you’re done.)
Once you’ve gotten your GameInstance opened, please start looking over this [documentation][2] that I sent earlier. If you scroll down, you’ll see a section for caching your achievements, and it goes over how to update that within the game instance. Continue on from here and update this in your game. I believe this is what you’re missing for your achievements to work properly.
Let me know if you have any further questions. 
