A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The behavior is normal / by design. Excel is not a CSV file editor.
CSV files can be used to import data which is exported from other systems, e.g. ERP, CRM systems.
Excel is designed to make a permanent connection to a CSV file, e.g. see this article:
Power Query - How to import a CSV file that does not match your locale - Microsoft Community
If you have an Excel file with such a query, you only you have to click Refresh to update the data.
Hope that helps.
Andreas.