I using latest version of Outlook for iOS. When I open up Outlook from the homescreen, everthings looks ok. But if I re-open the app then the screen flashes for a second. This only happens with my IMAP account and not with my Exchange account. Is there anyone that using the app and have the same issue? I have contacted Microsoft support but they could not help me becuse I running the app on iOS 10 beta (beta 5).