Resolved! Service Portal - What's the difference between id=form and id=ticket?
What caused the error that id=form says "Record not found" when a non-ITIL user uses that URL to view a record's detail. Visible to non-ITIL: https://<instance>.service-now.com/sp?id=ticket&table=incident&filter=&sys_id=a90e30241bf928ac5300419ead4b...
