I have five magazine issues in PDF format in my Box account. I wished to keep them in my iPad’s Books library and read them there. So for each I did the following.
- Opened PDF in the Box app and waited for it to fully download.
- Used the sharing action Open in Books.
They all opened in Books and I could page through them. But when I exited the PDFs there, only two of them remained in my library. The other three immediately disappeared from my library.
Why would that happen? Is there anything I can do about it? I can make them available offline and read them in the Box app but I prefer to collect all my reading material in Books.
This happened on an iPad Air 2 running iPadOS 13.3. I doubt this is caused by the Box app; could it be some property of the PDF that causes Books to remove it immediately on closing?