I use retroarch to play playstation games, and when I save them I have noticed that the game isn’t immediately saved to the memory card file. Also if the emulator quits without using the menu option the game is still not saved. If I go to the recent apps menu and remove retroarch, or turn off my phone without going into retroarch’s menu and selecting “quit retroarch” my game is not saved. The onlybway for my game to actually save is to remember to quit the emulator after I am done playing or my game won’t be saved.
I think that the solution would be to quit the emulator when the app quits, since that seems to be the problem.