REST 2 can't return Requestor data along with ticket

RT Users
1

Why requestor is null when I call below?

API Route with /tickets?

http://localhost:8080/REST/2.0/tickets?query=(%27Status%27=%27New%27AND%27id%27%3E%273960%27)&fields=Owner,Queue,Requestor&fields[Owner]=Name&fields[Queue]=Name

Return data sample

 {
         "_url" : "http://localhost:8080/REST/2.0/ticket/3961",
         "type" : "ticket",
         "Requestor" : "",
         "id" : "3961",
         "Queue" : {
            "id" : "34",
            "Name" : "Dev",
            "type" : "queue",
            "_url" : "http://localhost:8080/REST/2.0/queue/34"
         },
         "Owner" : {
            "_url" : "http://localhost:8080/REST/2.0/user/Nobody",
            "type" : "user",
            "Name" : "Nobody",
            "id" : "Nobody"
         }
      }

When I call like /ticket/id

http://localhost:8080/REST/2.0/ticket/3000

I can see Requestor

   "Status" : "New",
   "Subject" : "",
   "id" : 3961,
   "Created" : "2023-04-22T04:39:00Z",
   "Owner" : {
      "id" : "Nobody",
      "type" : "user",
      "_url" : "http://localhost:8080/REST/2.0/user/Nobody"
   },
   "Requestor" : [
      {
         "type" : "user",
         "_url" : "http://localhost:8080/REST/2.0/user/root",
         "id" : "root"
      }
   ],
   "InitialPriority" : "0",
   "Starts" : "1970-01-01T00:00:00Z",
   "LastUpdatedBy" : {
      "id" : "root",
      "type" : "user",
      "_url" : "http://localhost:8080/REST/2.0/user/root"
   },
   "Started" : "1970-01-01T00:00:00Z",
   "LastUpdated" : "2023-04-22T04:39:00Z",
   "Type" : "ticket",
2

If you add a &fields[Requestor]=Name to the first URL, do you see a Requestor structure then?