Excel iOS: auto-saves files despite having switched off auto-save
Please see https://answers.microsoft.com/thread/7768863c-337c-49a3-b207-1a9635510bad for a serious bug first reported by the OP over 4 months ago.
If auto-save is switched off (which I think it should be by default, but that's another matter) and I discard changes when exiting a file, the file timestamp still changes. This then spreads to other devices seeing the file on OneDrive. So if I just want to check something in a file from several years ago it suddenly looks like I've recently edited the file! This bug of course is not present in Windows.
I agree. Just to clarify, it happens if you pick up an Excel from a cloud service using the iOS cloud document picker. The bug has not always been there and the Excel version of perhaps a year back does not have this auto-save bug. If you access an Excel file through the native cloud connection in Excel, the bug does not happen.