Advanced search throws an error: An invalid XML character was found in the element content of the document

It is in 10.2 M030.

User has access to WTPart in the question of search. Advanced search > input Part number > hit search button. Exception window thrown. Image attached. 

I could notice *** when user returns back from failed search, attached second image.

It happens to only one user and for specific part number. Your feedback appreciated.

Thanks

Ayyappan