Adobe Digital Editions on iOS crashes every time I try to open a new book in the app, although a book previously read in the app can still be opened. Can it be because I am using two devices? The ADE FAQ on one hand says: "If two devices are activated with the same ID, purchased books can be opened on the other device." But on the other hand it says: "If the permission limits the books to be viewed on only one device, the copied books will not be able to be opened." The strange thing is: I know for sure that one book can be opened on both devices, whereas other books in the same series and from the same origin cannot. What happens in the app if the permission limits a book to be viewed on only one device? Does the app tell that the book cannot be opened? Or does the app crash?