Jason, Mike's comment #6 on bug 1822875 is relevant.
When no query string is present in the url, you're linking directly to the record. Direct links to records do not currently use display fields. That's why the duplication doesn't appear when you remove the query string.
Jason, Mike's comment #6 on bug 1822875 is relevant.
When no query string is present in the url, you're linking directly to the record. Direct links to records do not currently use display fields. That's why the duplication doesn't appear when you remove the query string.