Hi,
You can try a few things to fix the issue:
- Verify that your regional settings have the date and time format set correctly. You can change the date and time formats in Windows 11 by going to Settings > Time & Language > Date & Time > Change.
- Make sure Microsoft Excel is updated and has the most recent patches installed.
- Make sure your computer's keyboard language settings match the language on your actual keyboard. Some keys or shortcuts may behave differently on some keyboard layouts than others. Go to Settings > Time & Language > Language to check the keyboard language settings.
Best Regards.