Unexpected Excel restore loses all modifications

[u144644]

While editing, Excel restored the workbook and I lost all changes. Since Excel did not crash there was no recover file to retrieve the data. Has anyone seen this unexpected event before? This had never happened before while working with Excel for a long time and seemed to just start like some kind of macro or application was added. Could it be backup software that is doing this, closing files then reopening them without any warning? Is there any way to know or track in logs or events what happened to Excel? Even with autosave enabled, I lost all changes from the time I initially opened the file so I have to close then reopen the worksheet to be sure I don't lose any data. Is there anyway to prevent any unknown execution from Excel without prompt from losing data?