I don't think this is app specific, seems to happen with multiple apps on my iPad, like Dropbox and Facebook. I think it is a problem (feature?) of iOS. When I have a document open in Dropbox, or have opened a link in Facebook, and multitask to another app, when I go back to the app the item I had open is closed and I am returned to the "home" of the app. So for Dropbox that is the folder view and for Facebook it is the News Feed. It seems to happen only if some time has passed, not exactly sure how long it is. This is pretty annoying. Thought maybe it had something to do with the background refresh setting, (that it needed to refresh in the background to keep the doc open somehow), but that doesn't seem to be the case. Is there an option in iOS to fix this, I hate having to reopen docs in Dropbox. I can't see applicable options in individual apps... Thanks!