A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
I think I had the same problem - something changed a couple of months ago.
Previously in the search box of the File-Open dialog I could type a part of a filename of a recently opened spreadsheet and then select it - all very fast.
What changed is that the initial list of matches gets changed to a much longer list of files after a short pause. Presumably other files which include the search string in their contents, including files on OneDrive. As I click the file I want, the list changes, and the wrong file opens.
CoPilot led me to set this registry key:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\ExperimentConfigs\Excel\Open]
"DisableEnhancedOpen"=dword:00000001
I then closed Excel and killed the hidden Excel process that was still running and on re-launch... I think it fixed the issue.