I've noticed that when I input data in one document pane, then move to another document pane, I will sometimes lose the data from the first pane if I don't hit save.
I haven't yet noticed a consistent pattern as to when it happens, but I've noticed it both when I switch between documents in the same topic and switch between topics.
I'll keep watching it and if I notice a pattern, I'll send you the instructions.
I think I've figured out a pattern. I think the problem occurs when I drag-and-drop text from one document pane to another. I'm going to send you test file with instructions on how to reproduce it.