YAML: dotted attributes escape sequence

[stanislavbebej-ext43345]

When querying Spring Cloud Config with a dotted YAML attribute, it gets split into multiple lines:

Source file (application.yml):

appName: sample-app
metadata:
  name: ${appName}
  annotations:
    app.acme.com/source: https://github.com/acme/${appName}

Expected output:

appName: sample-app
metadata:
  name: sample-app
  annotations:
    app.acme.com/source: https://github.com/acme/sample-app

Actual output:

appName: sample-app
metadata:
  name: sample-app
  annotations:
    app:
      acme:
        com/source: https://github.com/acme/sample-app

I have tried escaping the dots multiple ways, none of them worked, except for one "hack" workaround:

Source:

metadata:
  name: sample-app
  annotations:
    default:
      app.acme.com/source: https://github.com/acme/sample-app
    double:
      "app.acme.com/source": https://github.com/acme/sample-app
    single:
      'app.acme.com/source': https://github.com/acme/sample-app
    doubleBr:
      "[app.acme.com/source]": https://github.com/acme/sample-app
    singleBr:
      '[app.acme.com/source]': https://github.com/acme/sample-app
    # Working workaround
    hack:
      ${x-dottedAttribute}/source: https://github.com/acme/sample-app
    # Not working workaround
    hackNested:
      ${x-dottAtts.acme}/source: ${x-dottAtts.acme}/source
    # # Not working workaround returning HTTP 400
    # hackList:
    #   ${x-dottAttList[0]}/source: ${x-dottAttList[0]}/source
x-dottAttList:
  - app.acme.com
x-dottAtts:
  acme: app.acme.com
x-dottedAttribute: app.acme.com

Output:

metadata:
  name: sample-app
  annotations:
    default:
      app:
        acme:
          com/source: https://github.com/acme/sample-app
    double:
      app:
        acme:
          com/source: https://github.com/acme/sample-app
    single:
      app:
        acme:
          com/source: https://github.com/acme/sample-app
    hack:
      app.acme.com/source: https://github.com/acme/sample-app
    hackNested:
      acme/source: app.acme.com/source
    doubleBr[app:
      acme:
        com/source]: https://github.com/acme/sample-app
    singleBr[app:
      acme:
        com/source]: https://github.com/acme/sample-app
x-dottAtts:
  acme: app.acme.com
x-dottedAttribute: app.acme.com
x-dottAttList:
  - app.acme.com

I am using the latest Spring Cloud Config version 4.0.4 (using hyness/spring-cloud-config-server:4.0.4-jre17 docker image from dockerhub), Spring Boot v3.1.2, Java 17.0.7, "native" profile.

This might be related to the existing #1595 issue.

Is there a way to "escape" the dots in attribute so that Config Server would not interpret them? Is this expected behavior?

Thank you very much for your help.