I also have had the problem of files reverting to previous versions.
Here are some examples of files reverting to previous versions:
On March 25, I opened an Excel file that had been most recently saved on March 6, 2025, showing a size of 93.2 KB. When opened I opened this file, it showed the version that had been saved on 11 Nov 24. Both files were the same size of 93.2 KB.
There had been seven updates to this file from November 4^^to March 6.
I noticed that the March 5^^save had saved two of this same file at the same exact time of 4:26 pm. The one that it had elected to be the most recent was the one that was the 11 Nov 24 version and not the one that had just been saved.
This problem has been happening to other files from time to time. Last week I had another file that did the same double save (with the same save time) with the old file showing as the most current file. This supposed most current file was also several months old. File sizes in this case were vastly different. I finally found the correct version through version history. The change was significant, and I had thought that I lost months worth of data.
I know what to look for now when I notice this error, but this is quite concerning. If I do not notice and apply updates to an outdated file, it could end up being quite a mess.
I hope that you can find out what is causing the OneDrive to overwrite a good save with an outdated version. I am losing confidence in OneDrive and I am taking steps