Views empty Filter Operator List

I cannot reproduce that. I have created a view with exposed filters.

query DemoQuery{
  entityById(entityType: VIEW, id: "search_content") {
    ... on View {
      executable(displayId: "default") {
        ... on ViewSearchContentDefault {
          itemsPerPage
          sorts {
            pluginId
          }
          filters {
            options
          }
          pager {
            perPage
            totalItems
          }
          execute(page: 0) {
            rows {
              entityBundle
              id
              label
            }
          }
        }
      }
    }
  }
}

Result:

{
  "data": {
    "entityById": {
      "executable": {
        "itemsPerPage": 0,
        "sorts": [],
        "filters": [
          {
            "options": {
              "id": "type",
              "table": "search_api_index_index",
              "field": "type",
              "relationship": "none",
              "group_type": "group",
              "admin_label": "",
              "operator": "or",
              "value": {
                "page": "page"
              },
              "group": 1,
              "exposed": true,
              "expose": {
                "operator_id": "type_op",
                "label": "Inhaltstyp",
                "description": "",
                "use_operator": true,
                "operator": "type_op",
                "operator_limit_selection": true,
                "operator_list": {
                  "or": "or"
                },
                "identifier": "type",
                "required": false,
                "remember": false,
                "multiple": false,
                "remember_roles": {
                  "authenticated": "authenticated",
                  "anonymous": "0",
                  "content_editor": "0",
                  "administrator": "0"
                },
                "reduce": false
              },
              "is_grouped": false,
              "group_info": {
                "label": "",
                "description": "",
                "identifier": "",
                "optional": true,
                "widget": "select",
                "multiple": false,
                "remember": false,
                "default_group": "All",
                "default_group_multiple": [],
                "group_items": []
              },
              "reduce_duplicates": false,
              "plugin_id": "search_api_options"
            }
          }
        ],
        "pager": {
          "perPage": 2,
          "totalItems": 0
        },
        "execute": {
          "rows": [
            {
              "entityBundle": "page",
              "id": "1",
              "label": "Home"
            },
            {
              "entityBundle": "page",
              "id": "1",
              "label": "Home"
            }
          ]
        }
      }
    }
  }
}

The selected operator is or, and the value is "page". If I enabled the Option "Limit the available operators", the array operator_list is filled.