Contextual search results "attach"button is not working as expected.

How to attach a KB link through the attach button to a different field than the additional comments field in an incident?

1. Filter Navigate to: Contextual Search > Table configuration
2. Select the record where:
   • Name = incidents
   • UI Type = Platform
3. In the related list Search Action Configuration open the record where
   • Action label = Attach
4. Check Use Custom Field for attach note
5. Set attach note field to "work_note"