GraphQL `getMRCodequalityAndSecurityReports` query 500 on gitlab.com

Whilst reviewing Update github.com/charmbracelet/git-lfs-transfe... (gitlab-shell!943 - merged), I noticed an error popup 'Something went wrong fetching the scanner findings. Please try again.' that continued to appear:

After inspecting the various HTTP requests, I found a failing https://gitlab.com/api/graphql call. Performing the following query at https://gitlab.com/-/graphql-explorer results in a 500 error:

query getMRCodequalityAndSecurityReports($fullPath: ID!, $iid: String!) {
  project(fullPath: $fullPath) {
    id
    mergeRequest(iid: $iid) {
      id
      title
      project {
        id
        nameWithNamespace
        fullPath
        __typename
      }
      hasSecurityReports
      codequalityReportsComparer {
        status
        report {
          status
          newErrors {
            description
            fingerprint
            severity
            filePath
            line
            webUrl
            engineName
            __typename
          }
          resolvedErrors {
            description
            fingerprint
            severity
            filePath
            line
            webUrl
            engineName
            __typename
          }
          existingErrors {
            description
            fingerprint
            severity
            filePath
            line
            webUrl
            engineName
            __typename
          }
          summary {
            errored
            resolved
            total
            __typename
          }
          __typename
        }
        __typename
      }
      sastReport: findingReportsComparer(reportType: SAST) {
        status
        report {
          added {
            identifiers {
              externalId
              externalType
              name
              url
              __typename
            }
            uuid
            title
            description
            state
            severity
            foundByPipelineIid
            location {
              ... on VulnerabilityLocationSast {
                file
                startLine
                endLine
                vulnerableClass
                vulnerableMethod
                blobPath
                __typename
              }
              __typename
            }
            __typename
          }
          __typename
        }
        __typename
      }
      __typename
    }
    __typename
  }
}

with variables:

{
  "fullPath": "gitlab-org/gitlab-shell",
  "iid": "943"
}