AEMasCS : Page replication issue (OOTB design reference /libs/settings/wcm/designs/default )

Hi Team,

We recently migrated our application to AEM as a Cloud Service. During page replication,  

/libs/settings/wcm/designs/default path included in the publish references.

 AEM as a Cloud Service, /libs is immutable and should not be published. As a result, page publication is blocked unless we manually uncheck this reference in the publication wizard and then proceed with publishing the page. To confirm we do not have any reference to this path in code.

Has anyone encountered this behavior before or knows what could be causing this OOTB reference to be added during publication? Is there any known component, policy, style system configuration, or reference provider that could introduce this dependency?

Any insights or suggestion would be greatly appreciated.

Many thanks in advance!