The current CSV export is broken, a double quote (") within a field (which is delimited by double quotes) is escaped by a backslash.
It should be escaped by another double quote.
Also a backslash itself is not escaped at all, this means a backslash as the last character of a field escapes the trailing field delimiter (double quote).
1Password Version: 7.3.2
Extension Version: Not Provided
OS Version: 10.14.6
Sync Type: Not Provided