Duplicate No successful full text search possible

[Cibox]

Affected version

2.0.1

Elasticsearch is installed on a separate server.

Today a user informed me that only results where shown if the check box for "search titles only" is marked.
Full text searches/ searches without the option "title only" lead to no matching results.

I tried to fix this with rebuilding the search index via cmd.php, I restarted the elasticsearch service, I checked my firewall rules, but I don't know what the reason for this could be.
No matter what I tried, the result was always the same.

Maybe it could be related to this issue reported by @AndyB ?
https://xenforo.com/community/threads/search-results-are-not-accurate.145321/

 

[Cibox]

Found the reason: The STOP words for the German language seem to be a bit too extensive.
A rebuild of the search index without Stop words fixed the issue.

But why are the searches with words from the stop list possible/successfull if I am searching "titles only"?

 

[Mike]

This seems likely to be related to: https://xenforo.com/community/threads/stop-word-problem.140972/