This software has done this too me soooo many times. I've had it!!!
Why does the QBO not have auto save and saved versions yet??? When I go to save an invoice or an estimate it kicks me out to the login page and the invoice or estimate doesn't save and is gone. For some reason it doesn't cache it in the audit section either. I have excellent internet and it still does it.
This is frustrating and ridiculous. I work on many online applications that all have excellent versioning and auto save functionalities. QBO needs to figure this out.