The method is now also invoked whenever a console tab is refreshed. Previously, a user would have to click into a different tab then click back into the original to invoke the onNavigationChange() method. For example, when you create a new case in a console, that tab is refreshed when you save it. The new case, previously, would not have invoked the method. With this update, the case loaded in that tab will invoke the method. This allows CTI providers to log a call against newly created case records.
For more information, see the Open CTI Developer Guide.