Created attachment 892798 [details]
[advance search]In advance search result page, expand case detail, system give the tips in tag field: No tag found, while it has tags.

Description of problem:
as subject.

Version-Release number of selected component (if applicable):
v3.8.7-4 on qa server

How reproducible:
100%

Steps to Reproduce:
1.There is a case which has tags.
2.Enter advance search page, input search keywords to filter the case.
3.In advance search result page, expand case detail, check the tag field for the case.

Actual results:
System give the tips: No tag found.

Expected results:
System show case's tag right. 

Additional info:
The above issue also happened to Component|Tag|Attachment.