I completed a special event and even got rewarded for it. I logged out and logged in back after a few hours but my rewards are gone and seems like the game took me back to a time where I haven't finished the event. This happens so many times. I had 3 stars filled then I logged out because I ran out of energy and when I logged back in, the stars were not filled at all. I honestly still playing it because of the story/plot but thinking of uninstalling it now.