Can't restore purchases – Scientific American Mind Review

I downloaded IOS8 and all my purchases disappeared. I have been trying to restore them but my attempts fail all the time. However it becomes possible to download every single issue one by one after I delete the application, then something happens and the application turns off by itself, when I turn it on, my purchases are lost again... And I have to download it all over... Very disappointing!
Review by medcezir on Scientific American Mind.