Hello,
This kind of issue was ever solved by a very old note 1308330 - WebUI: Account search gives no result. I guess you are having enhancement for this. And if you deactivate the enhancement, the issue won't be there, am I right?
Would you please check the coding correction mentioned in this note, and check whether the coding introduced in the above note is included in your enhancement? For example
CL_BP_HEAD__MAINSEARCHSHU_CN00
GET_V_CATEGORY
's coding.
Hongyan