Office documents are not reliably saved in OneDrive on iPad when using the Files app

I edited an Excel document by tapping on it in OneDrive on iPad, closed it, and opened it. The opened version was not the version I closed. Unreliable saving of office documents also happens in other apps like Word. It is a nightmare to work like this on iPad and highly frustrating and embarrassing: I sent an Excel file (by attaching it to an email) to a colleague, which did not reflect my recent changes and was therefore completely wrong. It was suggested to not send Office documents by attaching them to an email but rather send a link. While this may work in most situations, there are times when I actually want to send a copy to a colleague and not a link. The problem also impacted me when duplicating a file, e.g., for a backup, i.e., an old version was duplicated. I also experienced that a different (older) version was shown after opening an office document in the Word or Excel apps on iPad after closing it. I have experienced these problems for a long time and I have filed several bug reports both to Apple and Microsoft. Although saving files reliably is very important, it has not been properly addressed. It seems that I am not the only person who saw this or related problems: - https://answers.microsoft.com/en-us/msoffice/forum/all/word-on-ipad-local-not-saving/4e058ab0-0b06-4936-9a77-893a541df87f - https://learn.microsoft.com/en-us/answers/questions/682215/microsoft-office-apps-for-ios-does-not-correctly-s Has anyone else experienced such problems? What can I do about this?
**Here is an example** for the Excel file „Vergütungen 2022-2023“, which I opened from the Files app and then modified it in the Excel app. When I open the Excel document file from Safari or the OneDrive app, I get an old version. When I open the Excel document from the Files app, I get the version I just modified (although the date in the Files app is also yesterday).
**Image 1: In the Excel app on iPad, it is confirmed that the file has been saved just now.**

**Image 2: However, in the Files app on iPad, the save date is yesterday.**

**Image 3: The date in OneDrive in Safari is also from yesterday, but it differs from the date in the Files app.**

**Image 4: In the OneDrive app on iPad, the date is also yesterday.** **Update March 2, 2024: The problem has still not been solved under iPadOS 17.3.1.**