In Agent workspace, 'New' button under the child cases related list is not working as expected on the extended tables. - Known Error

In Agent workspace, 'New' button under the child cases related list is not working as expected on the extended tables. Description In Agent workspace, 'New' button under the child cases related list is creating a case on parent table instead of extended child table.

Steps to Reproduce

1. Login any OOB instance with Paris or any other versions 2. Go to sys_db_object.LIST and mark the Extensible checkbox under the controls tab for the Incident table. 3. Create a new table by extended the Incident in PlatformUI. 4. Now Navigate to Agent workspace. 5. Create List view on created table from the My LISTs tab 6. Now Click on the New button on table list view 7. Click on configure page available on user profile located on right top and select the configure form layout https://docs.servicenow.com/bundle/paris-servicenow-platform/page/administer/workspace/task/configure-form-layout-AW.html 8. Create a form layout with New view name called "Workspace" and Add Few field like Number, Description etc. to form 9 Similar configure the related list 'child cases' to the form. 10. create a record on configured form 11. Go to the Child cases sub tab on created record and Click on the New button 12. Observe that the record is getting created on the Incident table instead of the child table

Note:This behaviour is observed on extending all other tables as well.

Workaround This problem is currently under review. You can contact ServiceNow Technical Support or subscribe to this Known Error article by clicking the Subscribe button at the top right of this form to be notified when more information will become available.