As much as I love this game there are some major glitches. I finish a task with full stars, collect the rewards, load the game the next day or a few hours later to find that I'm still doing that same task and have now failed as I've "run out of time" or I've lost the progress I've already made. I can't make any progress in the game at this point. Quidditch friendlies also glitch on me, I go to change from the chaser position, hit play and I'm still a chaser but I'm not playing my own character.