No, the commas are not breaking the CSV file. Maximum number of characters allowed in a single cell of MS Excel sheet is 32,767. If a column exceeded the characters limit then it’s breaking the CSV format. In our case details column having more characters in some post_edit staff actions. If I open the same CSV file in Google Sheets then it renders all the columns correctly.
If needed I’ll limit the maximum number of characters for details column to ~30,000 in the export unconditionally.