GraphQL query causing HTTP/502

gistfile1.js

query  {
  repository(owner: "pytorch", name: "pytorch") {
    pullRequest(number: 68111) {
      closed
      isCrossRepository
      author {
        login
      }
      title
      body
      headRefName
      headRepository {
        nameWithOwner
      }
      baseRefName
      baseRepository {
        nameWithOwner
        isPrivate
        defaultBranchRef {
          name
        }
      }
      mergeCommit {
        oid
      }
      commits(first: 100) {
        nodes {
          commit {
            author {
              user {
                login
              }
              email
              name
            }
            oid
            checkSuites(first: 50) {
              nodes {
                app {
                  name
                  databaseId
                }
                workflowRun {
                  workflow {
                    name
                  }
                }
                checkRuns(first: 10) {
                  nodes {
                    name
                    conclusion
                  }
                  pageInfo {
                    endCursor
                    hasNextPage
                  }
                }
                conclusion
              }
              pageInfo {
                endCursor
                hasNextPage
              }
            }
          }
        }
        totalCount
      }
      changedFiles
      files(first: 100) {
        nodes {
          path
        }
        pageInfo {
          endCursor
          hasNextPage
        }
      }
      reviews(last: 100) {
        nodes {
          author {
            login
          }
          state
        }
        totalCount
      }
      comments(last: 5) {
        nodes {
          bodyText
          author {
            login
          }
          authorAssociation
          editor {
            login
          }
          databaseId
        }
        pageInfo {
          startCursor
          hasPreviousPage
        }
      }
    }
  }
}