Hi Paul,
After discussing current behavior with our dev team we decided to improve current behavior, however currently I can't be more specific exactly when this change will be available (most probably in the internal builds after the Q3 release).
Also until the change is implemented you can bind event to the
scheduler to detect when the widget is no longer the active element on the page - this way you will be able to detect when the selection is not visible to the user and optionally call your "change" event handler
(example here).
Regards,
Vladimir Iliev
Telerik
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