It appears we are using the same form
OrderRequestActionForm for both order request and for request items.
OrderRequestItemAction must use a different code group for actionCode:
Please update the
OrderRequestItemAction.CodeGroup.actionNameCode = 'ORDER_REQUEST_ITEM_ACTION' and use this code value in the dropdown when adding actions for items.
Please display the list of selected items in the form.
After adding the new item actions, please make sure that the "Item actions" tab is properly updated with new contents.