Please fix this bug!

I really love this app; as an aspiring writer, I love the app’s organization, templates, and everything else. However, I keep encountering a problem where when I take the screen off of full-screen mode, the screen goes to black and displays a message saying I either need to continue the app in its current state or force quit the program, and almost every time the program won’t even let me press either button. Please update the app to fix this bug, because I really love the app and would hate to have to delete it and try to find another writing app that’s just as good.

The Blue Nerd about iBooks Author, v2.5