Extended fields Subcategory[Incident] & Close notes [incident] show the proper data when the list is loaded but when you click on the cell to edit the value, the spinning circle appears and does not ever open the cell to edit.
Developer tools log error: Uncaught TypeError: Cannot read property 'getElementsByTagName' of null
Expected behavior in the platform
Choice field Subcategory[Incident] & Close notes [incident] are extended fields. The base table can show the field however, editing the field as a choice fails because there's no choices at the base table level. These choices only exist in the extended table. In order to resolve this issue It is recommend to build the list from the extended table into your base table.