GitLab CI JSON schema definition does not fully support YAML anchors

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GitLab CI schema as downloaded from the following URL:

https://gitlab.com/gitlab-org/gitlab/-/raw/master/app/assets/javascripts/editor/schema/ci.json

and configured in my IntellIJ 2022.2.3 (Ultimate) as JSON Schema Version 7 mapping seems not to understand YAML Anchors used in the CI pipeline definition file.

Redacted fragment from the pipeline definition:

.authenticate: &authenticate
  - 'BEARER_TOKEN=$(curl -s -X POST -H "Authorization: token ${API_TOKEN}" https://foo.net/api/tokens/authenticate | jq -r .bearerToken)'

.vulnerability-scan-check-script: &vulnerability-scan-check-script
  - *authenticate

.vulnerability_scan_check_job_template: &vulnerability_scan_check_job_template
  script:
    - *vulnerability-scan-check-script

vulnerability_scan_results_check:
  stage: verify scan results
  variables:
    API_TOKEN: 'some-value'
  <<: *vulnerability_scan_check_job_template
  tags: [shell]

The following error is reported at the definition of &authenticate YAML Anchor:

Schema validation: incompatible types: Required: string. Actual: array

Entire pipeline works well in our hosted GitLab Enterprise Edition 15.3.1-ee.

Am I missing something?