Global Search displays most search results twice.
For example, in this query: https://global-search.toolforge.org/?q=.*®ex=1&namespaces=8&title=(Wikimedia-copyrightwarning)(%2F.*)%3F
There are 349 results, but if you export them to some tool that lets you remove duplicates, you'll find that there are only 230 unique results.
Previously (last year): T359136: Global-search is showing duplicate results
Most plausibly the global-search side is picking up indices that are not live on the production side. IIRC this runs queries against the * index, it may have to be a little more selective and use *_content,*_general,*_file
This would essentially happen whenever we are running reindexes, as that causes duplicate indices to exist for some time.
Sorry about that! Not sure where I was ~2 months ago… somehow I missed all the pings. As co-maintainer though you should feel free to self-merge and deploy as you see fit :)
I'm assuming we can call this resolved. The example from the bug report shows 218 results, closer to what was expected.
Thanks for the report and the fix!