ThingTemplate subscription not executing in derived things

Above is a general outline of our Thingworx Model we are working towards using Thingworx 8.5.0-b12 with Kepware's KepServer. We start with a base ThingTemplate, then have a set of Thing Templates inherit the BaseTemplate based on the manufacturer or model of the real world device we are modeling. From there, we create a Thing for the real-world device and it inherits from the appropriate model template. We then bind the properties of our Things to the properties of Industrial Things that are made available through our Kepware Industrial Connection.

The problem comes when I added an overridable service and subscription to the BaseTemplate. The subscription calls the service on the AnyDataChange event for 'Me'. This works great except for the Things derived from a particular model's ThingTemplate.

For the Things that derive from the problem ThingTemplate, I can observe that the properties are changing through the binding to their corresponding Industrial Thing. If I add an additional subscription to the problem ThingTemplate that is subscribed to AnyDataChange and call the same service, it works.

This is a result of moving the service and subscription from the model ThingTemplates down to the BaseTemplate to remove duplicated logic.