In the simple example provided at the very bottom at: https://www.telerik.com/kendo-vue-ui/components/scheduler/data-binding/, it seems that no event is triggered when trying to delete a "current occurrence" of a recurring event. The behaviour should be that the update event is fired as far as I can tell from the documentation. This is also the behaviour when using the vue-component "kendo-schedulerdatasource". But using the SchedulerDataSource object does not trigger the update event.
I have attached the files that demonstrate the issue if for example trying to delete the recurring "Dance Practice" event