Board Thread:Questions and Answers/@comment-24501771-20151221193353/@comment-25889587-20160229132156

A-Lota-Zing wrote: I have an iPhone & from day 1 I've had to deal with this & that's why I don't even bother with it because I'm not restarting app every time I finish A level. It's a pain in my A$$!!! No, I have not let the Devs know either cuz I'm not dealing with them & the BS they will send that's a standard email they send everyone. Which iPhone did you use?

Anyway, I think the mystery box works the same like Gifts Lucky Draw. The rewards are already in before you open the reward. They just made those animations to make you feel that you are getting rewarded with your choice :P Placebo Effect.