The company I work for supports various newspaper sites that use InDesign, some of which now are using InDesign CC2015 (11.2).
In this version, a workspace is remembered -- i.e., continues to appear when creating a new document in the same session, or after quitting and then restarting InDesign -- only if the workspace was selected manually.
If the workspace was specified using a script or changed through the SDK, it is not remembered.
This issue is only in InDesign CC2015 (11.2). A workspace specified using a script or changed through the SDK is remembered in InDesign CC2015 (11.1) and earlier versions.