When searching some items, where there are non-English letters, like "Kimi Räikkönen", it does not give any results. However it recognizes letter "ü". When When searching just "Kimi", then Kimi Räikkönen can be found, but the string uses the following code "Kimi R\u00e4ikk\u00f6nen".
A possible reason could be that the unserialization fails for the indexed document.
Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=45860