The following section for the migration guide from 2.5 => 2.6 includes specific details about how Zync manages routes and how different deployment options in 3scale can affect the behaviour of this process.

https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.6/html/migrating_3scale/upgrading-3scale#migrate-route-management

There is no such section for new users of 3scale 2.6 or 2.7 and therefore customers are running into issues where they do not know how to disable this feature. We need to document how to configure Zync to enable/disable automated route creation/management for each service.