Hi Amirahussein,
I got into the same issue with names being retrieved correctly from the DB but not being properly indexed. After some digging I found that I had some extra parameters to the JVM Options, restart the Task Server (JAVA) and everything was back to normal again.
The JVM options are:
-Dfile.encoding=UTF-8
-DdefaultCharset=UTF-8
This worked in my case. Hopefully that will help you. Maybe in your case should be some Arabic CHARSET.
--Chip
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