Hello, I was editing a fillable PDF document in Firefox, which I had saved repeatedly (saved over existing file) as I was making changes. After a crash, I selected "recover session" and the document was open but was now empty. Another document I was editing, which was not open in Firefox but was being saved to a separate file, did not experience the loss of data entries. Would anyone happen to know the reason for this issue and whether there is any way to recover the data? Thank you.