Why does it do a second query instead of re-using the result?

query1.graphql

fragment on Viewer {
  files(first: 10) {
    edges {
      node {
        id,
        url,
      },
    },
  },
}

query2.graphql

fragment on Viewer {
  file(id: $file_id) {
    id,
    url,
  },
}

relay-route.grapqhl

query { viewer }

result1.json

{
  "data": {
    "viewer": {
      "id": "Vmlld2VyOnZpZXdlcg==",
      "_fileshv8l8m": {
        "edges": [
          {
            "node": {
              "id": "RmlsZTox",
              "url": "/files/1868919c13bae00c9ae96b77016a6304308fd498fc900793319936bd6813394f.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjA="
          },
          {
            "node": {
              "id": "RmlsZToy",
              "url": "/files/c05837255446c35af9c86eb20f968f81a9bf86a7eed98561d64674c95e5604db.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjE="
          },
          {
            "node": {
              "id": "RmlsZToz",
              "url": "/files/009cb233a0e29fbac9b6bbe5fa538075f8d8c34ed8e83059dd6fae24f8108229.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjI="
          },
          {
            "node": {
              "id": "RmlsZTo0",
              "url": "/files/0e3c644298a99ccf023236cdfa04125cea498fb3187e506aa7119338a6594793.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjM="
          },
          {
            "node": {
              "id": "RmlsZTo2",
              "url": "/files/fd77925a2750f12529ece6d19e7b5c00e4f24fc9ce4c560067efe50c7ca1c21f.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjQ="
          },
          {
            "node": {
              "id": "RmlsZTo5",
              "url": "/files/2c426d9ab8fc4c4ca08838ce4b0d3015bb6256c9d31730d4b40d4dd6d4ca9068.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjU="
          },
          {
            "node": {
              "id": "RmlsZToxMA==",
              "url": "/files/37c1d8f16845fc9493484f21e654c0304644ee79ddde5687f84ed02605b29ea1.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjY="
          },
          {
            "node": {
              "id": "RmlsZToxMQ==",
              "url": "/files/694b3d17fd81f9d0a31038c059dbf4d8af572477e0495fbb1cd2d846a14c18e5.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjc="
          },
          {
            "node": {
              "id": "RmlsZToxMw==",
              "url": "/files/e639caf199f4b5d1d57103e9d9b84d1b8323a03571f700e29cc8e93031ecabe5.jpg"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjg="
          },
          {
            "node": {
              "id": "RmlsZToxNA==",
              "url": "/files/200bcef1576b817498b4c2f2472f378dc23d7fa83725dbb47dd88f1712c0956e.png"
            },
            "cursor": "YXJyYXljb25uZWN0aW9uOjk="
          }
        ],
        "pageInfo": {
          "hasNextPage": true,
          "hasPreviousPage": false
        }
      }
    }
  }
}

result2.json

{
  "data": {
    "viewer": {
      "id": "Vmlld2VyOnZpZXdlcg==",
      "_filem0dvu1": {
        "id": "RmlsZTox",
        "url": "/files/1868919c13bae00c9ae96b77016a6304308fd498fc900793319936bd6813394f.png"
      }
    }
  }
}