literal backslash in csv-table data

"Alan G. Isaac" <[email protected]> Wed, 4 May 2022 16:28:34 -0400
Newsgroups gmane.text.docutils.user
Message-ID <[email protected]>
Are backslashes stripped out of the csv-table header?
If so, it this intentional? (In the csv-table data,
they just need to be doubled.)

Thank you, Alan Isaac