Publishing the Knowledge document after saving is erasing the Analyst.
1. Create a new Group called "Group" and create a new Knowledge Document.
2. In the KB click on TAB "2. Document Access"
3. in the field "Analyst" select "Group" and Save
4. Publish and now the field "Analyst" is empty.
5. If KB is published without saving then the Analyst field is not empty.
Release : 17.3
This is reviewed by SE via defect DE68807 and the fix will be included in 17.3 RU23